JP2020039147A - User device and method performed by base station - Google Patents

Abstract

To provide a method and a device that perform uplink (UL) scheduling and a method and a device that perform UL transmission.SOLUTION: A method that performs UL scheduling includes determining at least two modes for UL scheduling on the basis of the number of downlink (DL) subframes and the number of UL subframes. In each of the at least two modes, a different scheduling time delay is displayed.SELECTED DRAWING: Figure 1

Description

  Embodiments of the present disclosure relate generally to wireless communication technologies, and more particularly, to a method and apparatus for performing uplink (UL) scheduling and a method and apparatus for performing uplink transmission.

  In the Third Generation Partnership Project (3GPP), the network structure and various technologies required for moving a terminal between a 3GPP wireless communication network and a wireless local area network (WLAN) network are referred to as an interworking WLAN. Multi-mode wireless communication technology has evolved to use multiple wireless communication technologies simultaneously. By simultaneously using a plurality of wireless communication technologies, the transfer rate per unit time is improved, and the reliability of the terminal is improved.

  In wireless communications, spectrum is a very rare resource. A licensed band represents a frequency band that is exclusively licensed for a particular operator to provide a particular wireless service. On the other hand, the unlicensed band means a frequency band that is not allocated to a specific operator, but is open so that all entities that meet predetermined requirements can use the frequency band.

  In some parts of the world, unlicensed band technology must comply with certain regulations, for example, Listen-Before-Talk (LBT) and channel bandwidth occupancy conditions. LBT introduces uncertainty in channel availability. For example, an unlicensed band is available at any time during a subframe.

  LAA (License Assisted Access) has already been proposed to use an unlicensed band, and is one of the technologies of LTE-A (Long Term Evolvement-Advanced). In an LTE (Long Term Evolvement) system, UL transmission is controlled by an eNB (evolved node B). In other words, the UE transmits a signal according to the UL grant from the eNB. Therefore, there is a time delay between UL data transmission and UL permission transmission. Considering the above uncertain downlink (DL) and UL burst length, if a legacy scheme for UL transmission is used, then there are enough DL subframes to transmit UL grants for UL transmission. May not be

  The present disclosure provides a new solution for UL scheduling and UL transmission to mitigate or at least mitigate at least some of the problems of the prior art.

    According to a first aspect of the present disclosure, a method for performing UL scheduling is provided. The method comprises determining at least two modes for UL scheduling based on a number of downlink (DL) subframes and a number of UL subframes, wherein the at least two modes have different scheduling time delays. Is shown.

    According to a second aspect of the present disclosure, there is provided a method for performing UL transmission. The method comprises performing a UL transmission based on a scheduling mode for UL scheduling, wherein the scheduling mode is a predetermined scheduling mode or a scheduling mode indicated by a UL scheduling mode indication.

  According to a third aspect of the present disclosure, there is also provided an apparatus for performing the UL scheduling. The apparatus comprises a scheduling mode determiner configured to determine at least two modes for the UL scheduling based on a number of the downlink (DL) subframes and a number of the UL subframes. The at least two modes may exhibit different scheduling delays.

  According to a fourth aspect of the present disclosure, there is provided an apparatus for performing UL transmission. The apparatus may further include a UL transmission execution unit configured to execute the UL transmission based on a scheduling mode for UL scheduling, wherein the scheduling mode is a predetermined scheduling mode, or a UL scheduling mode. This is the scheduling mode shown on the display.

  According to a fifth aspect of the present disclosure, there is also provided a computer-readable storage medium embodied in a computer program code, wherein the computer program code, when executed, causes an apparatus to implement any one of the first aspects. The method is configured to perform an operation in a method.

  According to a sixth aspect of the present disclosure, there is further provided a computer-readable storage medium embodied with computer program code, wherein the computer program code, when executed, causes an apparatus to execute any one of the second aspects. It is configured to perform an operation in a method according to an embodiment.

  According to a seventh aspect of the present disclosure, there is provided a computer program product comprising a computer readable storage medium according to the fifth aspect.

  According to an eighth aspect of the present disclosure, there is provided a computer program product comprising a computer-readable storage medium according to the sixth aspect.

  Other features and advantages of embodiments of the present invention will become apparent from the following description of specific embodiments when read in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of embodiments of the present invention.

Embodiments of the invention are provided in an illustrative sense, the advantages of which will be described in more detail below with reference to the accompanying drawings.
FIG. 1 schematically illustrates a flowchart of a method 100 for performing UL scheduling according to an embodiment of the present disclosure. FIG. 2 schematically illustrates an exemplary scheduling scheme according to an embodiment of the present disclosure when the DL burst length is equal to the UL burst length. FIG. 3 schematically illustrates an exemplary scheduling scheme according to an embodiment of the present disclosure when the DL burst length is longer than the UL burst length. FIG. 4 schematically illustrates an exemplary scheduling scheme according to an embodiment of the present disclosure when the DL burst length is shorter than the UL burst length. FIG. 5 schematically illustrates an exemplary scheduling scheme according to another embodiment of the present disclosure when the DL burst length is shorter than the UL burst length. FIG. 6 schematically illustrates an exemplary scheduling scheme according to a further embodiment of the present disclosure when the DL burst length is shorter than the UL burst length. FIG. 7 schematically illustrates an exemplary scheduling scheme according to yet another embodiment of the present disclosure when the DL burst length is shorter than the UL burst length. FIG. 8 schematically illustrates an exemplary scheduling scheme according to one embodiment of the present disclosure when multi-subframe scheduling is enabled. FIG. 9 schematically illustrates an exemplary scheduling scheme according to another embodiment of the present disclosure when multi-subframe scheduling is enabled. FIG. 10 schematically illustrates an exemplary scheduling scheme according to a further embodiment of the present disclosure when multi-subframe scheduling is enabled. FIG. 11 schematically illustrates an exemplary scheduling scheme according to yet another embodiment of the present disclosure when multi-subframe scheduling is enabled. FIG. 12 schematically illustrates an exemplary scheduling scheme according to an embodiment of the present disclosure when the gap between DL and UL transmissions is considered. FIG. 13 schematically illustrates an exemplary scheduling scheme according to another embodiment of the present disclosure when the gap between DL and UL transmissions is considered. FIG. 14 schematically illustrates an exemplary scheduling scheme according to a further embodiment of the present disclosure when the gap between DL and UL transmissions is considered. FIG. 15 schematically illustrates an exemplary scheduling scheme according to yet another embodiment of the present disclosure when the gap between DL and UL transmissions is considered. FIG. 16 schematically illustrates an exemplary scheduling scheme according to yet another embodiment of the present disclosure when the gap between DL and UL transmissions is considered. FIG. 17 schematically illustrates an exemplary scheduling scheme according to another embodiment of the present disclosure when the gap between DL and UL transmissions is considered. FIG. 18 schematically illustrates an exemplary scheduling scheme according to a further embodiment of the present disclosure when the gap between DL and UL transmissions is considered. FIG. 19 schematically illustrates an exemplary scheduling scheme according to an embodiment of the present disclosure when a channel is available before the estimated gap. FIG. 20 schematically illustrates an exemplary scheduling scheme according to another embodiment of the present disclosure when the channel is available after the estimated gap. FIG. 21 schematically illustrates a flowchart of a method 2100 for performing UL transmission according to an embodiment of the present disclosure. FIG. 22 schematically illustrates a block diagram of an apparatus 2200 for performing UL scheduling according to an embodiment of the present disclosure. FIG. 23 schematically illustrates a block diagram of an apparatus 2300 for performing UL transmission according to an embodiment of the present disclosure. FIG. 24 is a simplified illustration of a device 2410 implemented or included in a UE, and a device 2320 implemented or included in a base station of a wireless network as described herein. FIG.

  Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be understood that these embodiments are provided only to enable those skilled in the art to better understand and practice the present disclosure, and are not intended to limit the scope of the present disclosure.

  In the accompanying drawings, various embodiments of the present disclosure are shown in block diagrams, flowcharts, and other figures. Each block in the flowcharts or blocks may represent a module, a program, or a portion of code that includes one or more executable instructions for performing the specified logical function, and in the present disclosure, the dispensable Blocks are indicated by dotted lines. Furthermore, while these blocks are shown in a particular sequence for performing the steps of the method, in practice, they need not be performed exactly according to the illustrated sequence. For example, they may be performed in reverse order or simultaneously depending on the nature of the respective operation. The flowchart block diagrams and / or blocks and combinations thereof may be implemented by dedicated hardware-based systems for performing the particular functions / operations, or by a combination of dedicated hardware and computer instructions. Note also that

  In general, the terms used in the claims shall be interpreted according to their ordinary meaning in the technical field, unless explicitly defined herein. A reference to "a / an / the / said" an element, device, component, means, step, etc. "" refers to a plurality of such devices, components, means, units, unless explicitly stated otherwise. , Steps, etc., are interpreted openly as references to instances of at least one element, device, component, means, unit step, etc. Also, as used herein, the indefinite article "a / an" Does not exclude a plurality of such steps, units, modules, devices, objects, and the like.

  In addition, in the context of the present disclosure, user equipment (UE) is a terminal, a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS). ), A mobile station (MS), or an access terminal (AT), where some or all of the UE, terminal, MT, SS, PSS, MS, or AT functions are available. May be included. Further, in the context of the present disclosure, the term “BS” may refer to, for example, a Node B (NodeB or NB), an evolved NodeB (eNodeB or eNB), a radio header (RH), a remote radio head (RRH). Head), a relay, or a low power node such as a femto, pico, etc.

  Embodiments of the present disclosure are directed to new solutions for UL scheduling and UL transmission. This solution is implemented between a serving node such as eNB and a terminal such as UE, and can support flexible UL scheduling time. In particular, the serving node may determine at least two modes for UL scheduling based on the number of downlink (DL) subframes and the number of UL subframes, wherein the at least two modes have different scheduling time delays Is shown. The eNB may optionally transmit a UL scheduling mode indication indicating at least two modes for UL scheduling, or may set the at least two modes as predetermined. The terminal device can perform UL transmission based on a scheduling mode for UL scheduling. The scheduling mode can be indicated by a UL scheduling mode indication. Alternatively, the scheduling mode is a predetermined mode, and the terminal device can estimate the scheduled UL subframe based on the predetermined frame and the frame structure.

  Thus, in embodiments of the present disclosure, different DL burst lengths and UL burst lengths can have different scheduling time delays. At the same time, at least two modes can be used together by one single terminal or different terminals, one DL sub-frame to send one or more UL grants for multiple UL sub-frames Frames can be used. In this way, for different burst lengths, UL subframes can be scheduled with a flexible UL scheduling scheme.

  In some embodiments of the present disclosure, the UL scheduling is an uplink cellular scheduling and the UL transmission is an uplink cellular transmission. For uplink cellular transmission, a terminal device can include a UE such as a terminal, MT, SS, PSS, MS, or AT. Meanwhile, the serving node may include a BS such as a Node B (NodeB or NB) or an evolved NodeB (eNodeB or eNB).

  According to another embodiment of the present invention, the present invention can be applied to various communication systems including, but not limited to, an LTE (Long Term Evolution) system or an LTE-A (Long Term Evolution Advanced) system. Given the rapid development of communication, there are also future types of wireless communication technologies and systems that can undoubtedly embody the present invention. Therefore, it should not be recognized as limiting the scope of the invention to only the above systems.

  Hereinafter, some embodiments of the present invention will be described in detail with reference to FIGS. However, it is to be understood that these exemplary embodiments are provided for purposes of illustration only, and that the present disclosure is not limited to the specific details described with reference to the exemplary embodiments. .

  Note that in embodiments of the present disclosure, the maximum channel occupancy time (MCOT) is the limit of the channel occupancy time, which can be applied to both DL and UL bursts. That is, the total length of the DL burst and the UL burst must not exceed MCOT. Alternatively, MCOT can be applied separately to DL and UL bursts. In other words, the MCOT is a restriction on either the DL burst or the UL burst, and neither the DL burst nor the UL burst must exceed the MCOT value. Rel. 13, the maximum value of the MCOT is 10 milliseconds, which will be described below as an example. However, the present disclosure is not limited to this, and may be longer or shorter, and the MCOT may be replaced. It is identified by other different words, such as a suitable transmission period, an expected transmission period, a possible transmission period, and the like.

Also, in the following description, for the sake of explanation, assuming that N DL subframes exist in a DL burst and M UL subframes exist in a UL burst, N is the DL subframe in the DL burst. , And M is the total number of UL subframes in the UL burst. Furthermore, in the present disclosure, n _i is used to indicate the index of the DL subframe within the set of DL subframes used to transmit the UL grant, n i ₌ 0, 1,. . . A N'-1, N 'denotes the number of subframes in a set of DL subframes, 1 ≦ N' is ≦ N, m _i is the index of the UL subframe in the UL burst And m _i = 0, 1,. . . , M−1, and m ′ = mod (M, N ′) means a remainder obtained by dividing M by N ′. All these signs are used throughout the disclosure and have the meaning just described, unless explicitly indicated otherwise.

  Reference is first made to FIG. 1, which schematically illustrates a flowchart of a method 100 for performing UL scheduling according to an embodiment of the present disclosure. Method 100 may be performed at or by a serving node, such as an eNB, or any other suitable device.

  As shown in FIG. 1, method 100 begins at step 110 where at least two modes for UL sub-scheduling are determined based on a number of DL subframes and a number of UL subframes, wherein at least two modes are selected. 9 shows different scheduling time delays.

  In embodiments of the present disclosure, it is proposed to use a legacy scheduling scheme (scheduling time is n + k, where n is the system subframe number and k is the required time delay between UL grant and UL transmission). Is done. If the DL burst length is equal to or longer than the UL burst length, the legacy scheduling method can be applied. On the other hand, when the DL burst length is shorter than the UL burst length, one DL subframe is used to transmit one or more UL grants to a plurality of UL subframes, that is, one DL subframe is transmitted. It is proposed to use it to schedule multiple subframes.

  If the DL burst length is greater than or equal to the UL burst length, there will be enough DL subframes to transmit UL grants for UL scheduling since a subframe configuration with DL subframes rather than UL subframes will be used. . In such cases, using existing scheduling schemes in LTE systems works well. That is, if the DL burst length is equal to or longer than the UL burst length, a legacy scheduling method with a scheduling time of n + k can be used.

  For the purpose of explanation, an example of a scheduling scheme when the DL burst length is equal to or longer than the UL burst length will be described with reference to FIGS. Also, as shown in FIGS. 2 and 3, MCOT applies to both DL and UL, which means that the total length of the DL burst and UL burst must not exceed MCOT.

  FIG. 2 schematically illustrates an exemplary scheduling scheme according to an embodiment of the present disclosure when the DL burst length is equal to the UL burst length. As shown in FIG. 2, since there are five DL subframes and five UL subframes (that is, the DL burst length is equal to the UL burst length), each DL subframe is one UL subframe of the terminal device. Is used by the UL grant carried in the DL subframe to schedule In such a case, the required time delay k between UL grant and UL transmission is 5, the scheduling mode is "n + k", and each of the UL subframes can be scheduled.

  FIG. 3 is a diagram schematically illustrating another example of a scheduling mode according to an embodiment of the present invention when the DL burst length is longer than the UL burst length. As shown in FIG. 3, since there are six DL subframes and three UL subframes (ie, the DL burst length is longer than the UL burst length), it is more than needed to schedule the UL subframe. There are also many DL subframes. In such a case, the required time delay k can be set to 4 and the scheduling mode is still “n + k”, and in order to reduce the scheduling time delay as much as possible, the UL subframe by its closest DL subframe Can be scheduled. In FIG. 3, the last three DL subframes are used to schedule UL subframes.

  The gap between DL and UL transmissions (or the gap between DL and UL bursts) is variable and depends on the LBT scheme used. For example, in FIG. 2, gaps are shown as short gaps that are much smaller than one subframe, while in FIG. 3, the gap between DL and UL transmissions is smaller than one subframe. Shown as long. In the case shown in FIG. 3, if the gap is small, for example, as shown in FIG. 2, k can be set smaller, for example, 3.

  The scheduling scheme described with reference to FIGS. 2 and 3 can also be applied to other cases with different MCOT and / or different k values, and those skilled in the art will appreciate the teachings provided herein. To the scheduling method can be achieved, and the detailed description is omitted.

  Further, it can also be understood that the required time delay k is not a fixed value but a variable value. That is, unlike the fixed value 4 of existing LTE systems, the value of k can be equal to 4, less than 4, or greater than 4. In other words, the required time delay k, and thus the scheduling delay time, depends on different DL / UL configuration patterns. For example, the required time delay k can be a variable value determined based on the subframe structure used, in particular, the number of downlink DL subframes and the number of UL subframes.

  Taking the LTE TDD system as an example, there are seven different subframe structures or patterns of uplink / downlink UL / DL configurations, ie configurations 0-6. For each configuration pattern, having a different ratio of DL subframes to UL subframes, which one configuration pattern is used for data transmission is determined based on DL / UL traffic conditions. If a certain configuration pattern is selected, the required time delay k can be set based on this, and the k value is not fixed but can be changed based on the subframe configuration pattern to be used. Thus, if a gap needs to be considered, it can be changed based on the gap between DL grant and UL transmission.

  In such a case, at step 120 of FIG. 1, a required time delay indication can be transmitted to the terminal device to indicate the required time delay as shown. The required time delay indication may be sent periodically or only when the k value is changed. The time delay can be transmitted in various ways, for example, by using RRC signals or bits in DCI format.

  Although the variable k is described herein with reference to FIGS. 2 and 3, it does not mean that it is not applicable to other scheduling schemes. Instead, any scheduling scheme as described in the present disclosure can be applied, for example, to the scheduling scheme described with reference to FIGS.

  On the other hand, if the DL burst length is shorter than the UL burst length, one DL subframe can be used to transmit one or more UL grants for multiple UL subframes. That is, a plurality of UL subframes can be scheduled to different terminal devices or to one terminal device. In other words, the determined scheduling mode is used by different terminals or by one single terminal to schedule multiple UL subframes. In this way, all UL subframes can be scheduled with DL subframes, even if there are not enough DL subframes.

  As mentioned above, at least two modes for UL scheduling exhibit different scheduling time delays and can be determined based on the number of downlink (DL) subframes and the number of UL subframes. In particular, different scheduling time delays can be determined based at least on the required time delay k between UL grant and UL transmission.

  In the embodiment of the present disclosure, a plurality of scheduling modes can be determined so that subframes in UL transmission are scheduled as many times as possible. For example, the different scheduling delays are the required time delay between UL grant and UL transmission, a multiple of the required time delay, the required time delay and a predetermined extension value, another multiple of the required time delay, the required time It can be selected from any of a combination of a delay and a multiple of a predetermined extension time value, and a combination of a required time delay and a time delay with two or more variable extensions.

  Next, as shown in FIG. 1, at step 130, an UL scheduling mode indication may optionally be transmitted to the terminal to indicate at least two modes for UL scheduling. Further, it is determined that the scheduling mode is the predetermined mode, and the terminal device can estimate the scheduled UL subframe based on the frame structure and the predetermined mode. In such a case, no mode display is required.

  The UL scheduling mode indication may be sent in any suitable way. For example, it can be transmitted by reusing the UL index of the downlink control information (DCI) format, for example, the UL index of DCI format 0/4. For example, the DCI format “MSB = 1” and “LSB = 0” are used to indicate the scheduling mode “n + k”, and 2 bits can be reused. In addition, it can be transmitted using additional bits in the DCI format.

  For illustrative purposes, reference is made to FIGS. 4-11 to describe various exemplary scheduling schemes that may be used in embodiments of the present disclosure. MCOT applies to both DL and UL, which means that the total length of the DL burst and UL burst must not exceed MCOT. In these figures, FIGS. 4 to 7 show examples of scheduling schemes in which different terminal devices can use different scheduling modes, and FIGS. 8 to 11 show scheduling schemes that support multi-subframe scheduling, that is, a single scheme. 4 shows examples of different scheduling modes that can be used by one terminal device. In these figures, a short gap between DL and UL transmissions is shown for simplicity of illustration, but it should be understood that the present disclosure is not so limited.

  First, a scheduling scheme in which different terminal devices use different scheduling modes will be described with reference to FIGS.

  Referring to FIG. 4, FIG. 4 schematically illustrates an example of a scheduling scheme when the DL burst length is shorter than the UL burst length according to an embodiment of the present invention. As shown in FIG. 4, the DL burst has four DL subframes, and the UL burst has six UL subframes. Here, MCOT = 10 and k = 4. In such a case, all DL subframes can be used to send UL grants so that all UL subframes can be scheduled, i.e., N '= N = 4. The scheduling method has, for example, two scheduling modes “n + k” and “n + 2k”, where the first scheduling delay time is the required time delay k, and the other scheduling delay time is the required time delay k. It is a multiple. Scheduling mode “n + k” is used by the first terminal and is indicated by “MSB = 1, LSB = 0”, scheduling mode “n + 2k” is used by the second terminal, and “MSB = 0, LSB = 1 ", for example. Thus, in this scheduling scheme, for the first N'UL subframe, the scheduling timing is n + k, ie, subframes 0, 1, 2, 3 transmit UL grants for subframes 4, 5, 6, and 7. Used to For the remaining M−N ′ or m ′ (Mod (M, N ′)) UL subframes, the scheduling timing is n + 2k, ie, subframes for transmitting UL grants for subframes 8 and 9, respectively. 0 and 1 are used.

  It is understood that throughout the present disclosure, the scheduling mode may be indicated by any different indication, as long as each has a particular indication, so that different terminals do not use the same scheduling mode or timing. For example, in the case of the scheduling scheme as shown in FIG. 4, the second scheduling mode can be indicated by an arbitrary display such as “MSB = 1, LSB = 1”, “MSB = 0, LSB = 0”. , Different from those used for the first scheduling mode.

  Reference is made to FIG. 5, which schematically illustrates an example of a scheduling scheme for the next mode, where the DL burst length is shorter than the UL burst length according to another embodiment of the present disclosure. As shown in FIG. 5, there are four DL subframes in a DL burst and six UL subframes in a UL burst, where MCOT = 10 and k = 4, which is similar to FIG. It is. In the scheduling method shown in FIG. 5, for example, there are two scheduling modes “n + k” and “n + k + m”, where a scheduling delay time is a required time delay k, and another scheduling delay time is a required time delay k And a predetermined extension value m ′. Therefore, the scheduling scheme of FIG. 5 is that the second scheduling mode n + k + m ′ is used for the second terminal to schedule the remaining MN ′ or m ′ UL subframes instead of n + 2k. 4 in that it differs from that of FIG. Thus, this scheduling scheme uses subframes 2 and 3 instead of subframes 0 and 1 to transmit UL grants for subframes 8 and 9 (the remaining two UL subframes). Is done. That is, in this scheduling scheme shown in FIG. 5, the two DL subframes closest to the UL subframe are replaced with the remaining two subframes instead of using the first two DL subframes as shown in FIG. Used to send UL grants to it. Thus, it is understood that in the embodiments of the present disclosure, when the scheduling mode n + 2k is used, the scheduling mode n + k + m ′ can be replaced.

  FIG. 6 is a diagram schematically illustrating an example of a scheduling method when the DL burst length is shorter than the UL burst length according to another embodiment of the present invention. As shown in FIG. 6, the DL burst has three DL subframes, the UL burst has seven UL subframes, and MCOT = 10 and k = 3. In such a case, all DL subframes can be used to send UL grants so that all UL subframes can be scheduled, i.e., N '= N = 3. In this scheduling method, there are three scheduling modes of “n + k”, “n + 2k”, and “n + 3k”, a first scheduling delay time is a required time delay k, and a second scheduling delay time is a multiple of the required time delay. (2k) and the third scheduling delay is another multiple (3k) of the required time delay. Thus, in addition to the subframes scheduled in the two scheduling modes used in FIG. 4, the remaining m ′ (mod (M, N ′)) subframes are further scheduled in the third scheduling mode n + 3k. be able to. The scheduling mode “n + 3k” is used by the third terminal and can be indicated by, for example, “MSB = 1, LSB = 1”. Thus, in this scheduling scheme, for the first N'UL subframe, n + k, i.e., subframes 0,1,2 are used to transmit UL grants for subframes 3,4,5. For the second N'UL subframe, the scheduling timing is n + 2k, i.e., subframes 0,1,2 are used to transmit UL grants for subframes 6,7,8. For the last m'UL subframe, the scheduling timing is n + 3k, i.e., subframe 0 is used to transmit UL grant for subframe 9.

  FIG. 7 further schematically illustrates an exemplary scheduling scheme when the DL burst length is less than the UL burst length, according to yet another embodiment of the present disclosure. As shown in FIG. 7, the DL burst has three DL subframes, the UL burst has seven UL subframes, and MCOT = 10 and k = 3, which are the same as in FIG. In the scheduling scheme as shown in FIG. 7, there are also three scheduling modes “n + k”, “n + 2k”, and “n + 2k + m ′”, the first scheduling delay time is a required time delay k, and the second scheduling delay The time is a multiple of the predetermined time delay, and the third scheduling delay is a multiple of the required time delay and a predetermined extended time value m ′. Thus, the scheduling scheme of FIG. 7 differs from that of FIG. 6 in that a third scheduling mode n + 2k + m 'is used to schedule the remaining m'UL subframes. Thus, in this scheduling scheme, subframe 2 is used to transmit a UL grant for subframe 9 (the remaining one UL subframe). Therefore, in this scheduling scheme shown in FIG. 7, instead of using the first DL subframe as shown in FIG. 6, the DL subframe closest to the UL subframe is UL enabled for the remaining m ′ subframes. Used to send. As in the case of FIG. 5, when the scheduling mode n + 3k is used, the scheduling mode n + 2k + m 'can be similarly replaced, and similarly, the scheduling mode n + 4k can be replaced with n + 3k + m'.

  In the following, reference is further made to FIGS. 8 to 11 to describe an exemplary scheduling scheme supporting multi-subframe scheduling. Here, multi-subframe scheduling refers to a scheduling scheme in which one UL grant is used to schedule a plurality of UL subframes. Therefore, in this sense, the scheduling schemes described with reference to FIGS. 4 to 7 do not belong to the multi-subframe scheduling because these scheduling schemes are used by different terminal devices with different UL grants. However, these scheduling schemes described with reference to FIGS. 4 to 7 can also be considered as multi-subframe scheduling when multi-subframe scheduling is defined in a more general manner. For example, one DL subframe can be used to define a scheduling method for scheduling multiple UL subframes with one or more UL grants, in which case, see FIGS. These scheduling methods described above belong to multi-subframe scheduling. Accordingly, although the scheduling schemes described with reference to FIGS. 4 through 7 are described in some embodiments as not belonging to multi-subframe scheduling, they are for illustration purposes only, and Can be extended to scheduling.

  Referring to FIG. 8, FIG. 8 schematically illustrates an exemplary scheduling scheme when multiple subframes are enabled according to one embodiment of the present disclosure. As shown in FIG. 8, the DL burst has four DL subframes, the UL burst has six UL subframes, and MCOT = 10 and k = 4. In such a case, all DL subframes can be used to send UL grants so that all UL subframes are scheduled, i.e., N '= N = 4. In the scheduling method, for example, there are two scheduling modes “n + k” and “n + 2k”. Unlike the one shown in FIG. 4, two scheduling modes “n + k” and “n + 2k” are used in one terminal device in two scheduling modes, and are indicated by “MSB = 1, LSB = 1”. The scheduling mode “n + k” is used in the terminal device and is indicated by, for example, “MSB = 0, LSB = 1”. Therefore, in response to receiving the indication 10 (MSB = 1, LSB = 0), the terminal adjusts the PUSCH transmission corresponding to both subframes n + k and n + 2k. That is, subframe 0 is used to send UL grants for both subframes 4 and 8, and subframe 1 is used to send UL grants for both subframes 5 and 9. . The terminal device adjusts the PUSCH transmission corresponding to the subframe n + k in response to receiving the indication 01 (MSB = 0, LSB = 1). That is, subframe 2 is used to transmit a UL grant to subframe 6, and subframe 3 is used to send a UL grant to subframe 7.

  FIG. 9 schematically illustrates an exemplary scheduling scheme when multi-subframe scheduling is enabled according to another embodiment of the present disclosure. As shown in FIG. 9, the DL burst has three DL subframes, the UL burst has seven UL subframes, and MCOT = 10 and k = 3. In such a case, all DL subframes are used to send UL grants so that all UL subframes can be scheduled, i.e., N '= N = 3. There are three scheduling modes, “n + k”, “n + 2k”, and “n + 3k”. Unlike the one shown in FIG. 6, three scheduling modes “n + k”, “n + 2k”, “n + 3k” can be used by one terminal device, and are indicated by “MSB = 1, LSB = 1”, The scheduling modes “n + k” and “n + 2k” can be used by one terminal device, and are indicated by, for example, “MSB = 1, LSB = 0”. Therefore, in response to receiving the indication 11 (MSB = 1, LSB = 1), the terminal device adjusts the corresponding PUSCH transmission in all of the subframes n + k, n + 2k and n + 3k. That is, subframe 0 is used to transmit UL grant for subframes 3, 6, and 9. In response to receiving the indication 10 (MSB = 1, LSB = 0), the terminal adjusts the corresponding PUSCH transmission in both subframes n + k and n + 2k. That is, subframe 1 is used to transmit UL grants for subframes 4 and 7, and subframe 2 is used to transmit UL grants for subframes 5 and 8.

FIG. 10 schematically illustrates an exemplary scheduling scheme when multi-subframe scheduling is enabled according to a further embodiment of the present disclosure. As shown in FIG. 10, the DL burst has three DL subframes, the UL burst has seven UL subframes, and MCOT = 10 and k = 3. In such a case, all DL subframes are used to send UL grants so that all UL subframes can be scheduled, ie, N '= N = 3. There is a combination of time delays in the scheduling scheme, which comprises the required time delay and two or more variable extensions, ie, a combination of scheduling modes. As shown in FIG. 10, the scheduling mode is indicated as follows.
n + k + 2n _i + k ′
Here, k ′ = 0, 1,. . . , Floor (M / N ′). floor (M / N ') means an operation for rounding down a value obtained by dividing M by N'. That is, ignoring the decimal value of the resulting value to obtain an integer.

Therefore, in this scheduling scheme shown in FIG. 10, the scheduling modes are n + k + 2n _i , n + k + 2n _i + 1,. . . , N + k + 2n _i + floor (M / N ′), which means that each of the DL subframes is used to transmit UL grants for ceil (M / N ′) consecutive UL subframes. I do. ceil (M / N ') means a round-up operation of a value obtained by dividing M by N'. That is, an integer is obtained by setting the decimal value (not including zero) of the resulting value to 1. It can be seen that if the decimal value of the result value is not zero, ceil (M / N ') becomes floor (M / N') + 1. Therefore, in the scheduling scheme as shown in FIG. 10, since ceil (M / N ′) is 3, there are three different scheduling modes. In particular, in the scheduling scheme, subframe 0 is used to transmit UL grants for subframes 3, 4, and 5, and subframe 1 is used to transmit UL grants for subframes 6, 7, and 8. Subframe 2 is used to transmit UL grant for subframe 9.

  Here, “floor (M / N ′)” and “ceil (M / N ′)” use N ′, but since k is usually equal to N ′, N ′ can also be replaced by k. This can also apply to any of the N's described below.

FIG. 11 schematically illustrates an exemplary scheduling scheme when multi-subframe scheduling is enabled according to yet another embodiment of the present disclosure. Unlike the scheduling scheme shown in FIG. 10, FIG. 11 uses a combination of a scheduling mode and another scheduling mode, and the combination of the scheduling modes includes a floor (M / N ′) scheduling mode, which is as follows. Is shown in
n + k + n _i + k ''
Here, k ″ = 0, 1,. . . , Floor (M / N ′) − 1. The other one is shown below.
n + N '* floor (M / N') + m '

Therefore, in this scheduling scheme, the scheduling mode, and _n + k + n _i, and _{n + k + n i +1,} . . . n + k + n _i + floor (M / N ′) − 1 and floor (M / N ′) + m ′. This is where each of the DL subframes is used to send UL grants for consecutive (M / N ') of the UL subframes, and the UL of the remaining modes m' (mod (M / N ')). The subframe is scheduled by the last m'mod (M / N ')) DL subframes. Specifically, as shown in FIG. 11, in the scheduling scheme, subframe 0 is used to transmit a UL grant for subframes 3 and 4, and subframe 1 is a UL grant for subframes 5 and 6. Used to send. Subframe 2 is used to transmit UL grants for subframes 7, 8 and the remaining subframe 9. It is understood that the DL subframe of the first m ′ (mod (M / N ′)) can be used and the UL subframe of the remaining mode m ′ (mod (M / N ′)) can be transmitted. .

  It should be understood that the different scheduling modes described with reference to FIGS. 8 to 11 can be used by a single terminal and can also be used by multiple terminals. In other words, different from the scheduling methods shown in FIGS. 4 to 7, different scheduling modes are used by different terminal devices, and the scheduling modes shown in FIGS. 8 to 11 are not limited thereto. That is, the scheduling scheme may be used by a single terminal and / or multiple terminals as long as UL subframes can be scheduled as much as possible.

  Also, from the scheduling scheme described above, it can be seen that usually two bits are used in the scheduling mode indication to indicate different scheduling timings. This can be implemented by reusing the UL index in DCI format 0/4 or by introducing two extra bits.

  In the scheduling method described with reference to FIGS. 4 to 7, MSB = 1 and LSB = 0 are already used to indicate “n + k” supported in the current communication, but this is changed. Other bits of the DCI format can be reused, or newly introduced bits can be used as an indication of the scheduling mode.

  In the scheduling method described with reference to FIGS. 4 to 7, for example, two bits such as a display 00 for n + k, a display 01 for n + 2k, a display 10 for n + 3k, and a display 11 for n + 4k are provided. It is also possible to use a combination of If the last mod (M, N ') UL subframe was scheduled by the last mod (M, N') DL subframe, use one of the available indications in the combination to indicate it can do. In addition, other combinations are possible.

  In the scheduling method described with reference to FIGS. 8 and 9, the display 01 (or 00) indicates the scheduling timing n + k, the display 10 (or 01) indicates the combination of n + k and n + 2k, and the display 11 (or 10). Can be redefined to indicate n + k, n + 2k and n + 3k. It can be appreciated that other combinations are possible.

In the scheduling method described with reference to FIGS. 10 and 11, no special indication is required for n + k + 2n _i + k ′, but when n + N ′ * floor (M / N ′) + m ′ is used, n + k + n _i + k '' And n + N '* floor (M / N') + m 'are required to be displayed. For example, the display 10 is used to show n + k + _ni + k ', and the display 01 is used to show n + N' * floor (M / N ') + m'.

  Further, the scheduling scheme can be specific to the frame structure (subframe configuration pattern). Therefore, when the frame structure is fixed, the scheduling method is also fixed. In such a case, the terminal device can independently estimate the scheduled UL subframe, and does not need any display.

  So far, the MCOT has been applied to the total number of DL bursts and UL bursts, and the scheduling method has been described on the condition that the gap between DL transmission and UL transmission is short. However, the DL burst and the UL burst can be transmitted separately, and each burst can have its own MCOT. This means that MCOT can be applied separately to DL and UL bursts. That is, the MCOT is limited to both the DL burst and the UL burst, and neither the DL burst nor the UL burst exceeds the MCOT value. It can also be seen that the gap between DL transmission and UL transmission is variable and depends on the LBT scheme used. Thus, the gap may be shorter than one subframe and a few subframes if the channel is occupied by other radio access technologies (RATs) or nodes that can use the channel for another MCOT time For a while.

  In such a case, the serving node may estimate the gap between the DL transmission and the UL transmission, and at least two modes for UL scheduling may be further based on the estimated gap. The gap can be estimated in various ways, for example, based on channel occupancy. As an example, a period of a past CCA or eCCA can be used as a reference. In embodiments of the present disclosure, gaps may be considered when determining a scheduling mode, for example, at least two modes for UL scheduling may add a required time delay to multiple subframes in the gap. Is determined by In some embodiments of the present disclosure, at least two modes for UL scheduling use the latest QDL subframes, and if the number of subframes in the gap is less than the required time delay, By scheduling the UL subframe of Here, Q is the difference between the number of subframes in the gap and the required time delay. In some other embodiments of the present disclosure, at least two modes for UL scheduling may be determined by using the last DL subframe to schedule all UL subframes.

  Hereinafter, with reference to FIGS. 12 to 18, a description will be given of a scheduling scheme further based on a gap in which a mode for UL scheduling is estimated. Assuming that the gap between the DL burst and the UL burst is at least T subframes, the DL burst ends at a slot boundary, the UL burst can start at a given symbol, and partial subframe transmission is allowed In this case, the total gap may be T subframes + partial subframes, and it is possible to count the scheduling time as T subframes + partial subframes. I do not care. Also, for simplicity, with reference to FIGS. 12-18, transmissions are shown as start and end at subframe boundaries. Further, it should be noted that the scheduling scheme can also be realized when there is a longer gap between the DL burst and the UL burst, as described in FIGS. 4 to 11.

  In some embodiments of the present disclosure, at least T subframes are estimated as unavailable subframes. All schemes as shown in FIGS. 2 to 11 can be applied by adding T subframes to the scheduling time delay. That is, for example, as shown in FIGS. 12 and 13, n + k can be changed as n + k + T, n + 2k can be changed as n + k + T, and n + k + m 'can be changed as n + k + T + m'.

  FIG. 12 illustrates an exemplary scheduling scheme when a gap between DL transmission and UL transmission is considered and different scheduling modes are used by different terminals according to an embodiment of the present invention. As shown in FIG. 12, the first four UL subframes can be scheduled in n + k + T mode, which is obtained by adding T to n + k, and the last two UL subframes can be obtained by adding T to n + 2k. Can be scheduled in the n + 2k + T mode. Further, it is clear that the n + 2k + T mode can be replaced by an n + k + T + m 'mode obtained by adding T to n + k + m'.

  FIG. 13 illustrates an exemplary scheduling scheme when the gap between DL and UL transmissions is considered and multi-subframe scheduling is supported, according to another embodiment of the present invention. Similarly to the one shown in FIG. 12, in FIG. 13, in the n + k + T mode and the n + 2k + T mode obtained by adding T to n + T and n + 2k, DL subframe 0 replaces UL subframes 0 and 4. DL subframe 1 is used to transmit UL grants for scheduling of UL subframes 1 and 5, and is used to transmit UL grants for scheduling. DL subframes 2 and 3 are used to transmit UL grants for scheduling subframes 2 and 3, respectively, in an n + T + k mode obtained by adding T to n + k. Further, it is clear that the n + 2k + T mode can be replaced by an n + k + T + m 'mode obtained by adding T to n + k + m'.

  In the embodiment of the present disclosure, when T is shorter than K, it is possible to take T in consideration of the required time delay k. In such a case, the UL subframe can be scheduled with the last KT subframe in the DL burst, as shown in FIGS.

  As shown in FIG. 14, UL subframes can be scheduled by the last two DL subframes of n + k mode, n + k + (kT) mode, and n + k + 2 (kT) mode, and the three modes are: , Can be used by three terminal devices. In particular, DL subframe 2 is used to transmit UL grants for UL subframes 0, 2, and 4, and DL subframe 3 is used to send UL grants for UL subframes 1, 3, and 5. Therefore, UL subframes 0 and 1 are scheduled in n + k mode, UL subframes 2 and 3 are scheduled in n + k + (k−T) mode, and UL subframes 4 and 5 are scheduled in n + k + 2 (k−T ) Mode.

  FIG. 15 schematically illustrates another example of a scheduling scheme according to another embodiment of the present disclosure. As shown in FIG. 15, UL subframes can be scheduled with the last two DL subframes in a combined mode of n + k mode, n + k + (kT) mode, and n + k + 2 (kT) mode. The combination mode can be used by one terminal or two different terminals. Thus, DL subframe 2 is used to send a single UL grant to schedule UL subframes 0, 2, and 4, and subframe 3 schedules UL subframes 1, 3, and 5. Used to send a single UL grant for

  If there are more UL subframes than those shown in FIGS. 14 and 15, n + k + 3 (k−T), n + k + 4 (k−T), etc. can be further used.

16 and 17 schematically show examples of further scheduling schemes according to further embodiments of the present disclosure. The scheduling scheme of FIGS. 16 and 17 uses the last KT DL subframe in the DL burst to transmit UL grants for UL subframes, uses k ₀ ′ and k ₀ ″, ₀ ′ = 0, 1,. . . , Floor (M / (N ′)), and k ₀ ″ = 0, 1,. . . , Floor (M / (N ′)) − 1, and is similar to that shown in FIGS. 10 and 11, except that N ′ is equal to k−T instead of N or k.

Further, T> = k and T can be considered for the required time delay k, ie, as shown in FIG. 18, to schedule all UL subframes in a UL burst, the last The use of one DL subframe may be considered. Here, UL subframe is scheduled in n + T + _{m i.} Further, in such a case, it is also possible to directly add T to the scheduling time delay as shown in FIG. 12 or FIG.

  The embodiment has been described above assuming that the channel is just available in the first scheduled UL subframe. However, in an actual UL transmission, it can be understood that a channel may exist after the UL burst or before the UL burst, and in such a case, a problem may occur. For example, if the channel is available before the UL burst, there may be two possible options. In one option, the terminal may wait until a scheduled subframe arrives, in which case it allows the channel to be occupied by other RATS and nodes during the waiting time. As another option, the channel may not be occupied by other RATS and nodes during the waiting time, and the terminal may send a reservation signal to reserve the channel, which is a waste of channel resources. Means In such a case, the terminal device can execute the UL transmission according to the schedule. That is, the terminal actually occupies the clear channel before the UL burst and the scheduled UL subframe, and actually occupies more scheduled UL subframes, but the UL transmission may exceed the MCOT. is there. Alternatively, the UE can only transmit within the time allowed to satisfy the MCOT, so the terminal knows the expected transmission period or MCOT, monitors the start of transmission and considers the reservation signal There is a need to. On the other hand, if the channel is after the UL burst, the UL burst is postponed for a certain period of time, and the previously transmitted UL grant cannot cover the entire UL burst, in which case the terminal device is When UL transmission is performed, it means low transmission efficiency.

  With this in mind, the method may further comprise transmitting a transmission period indication indicating the allowed UL transmission period, as shown in step 140 of FIG. As mentioned above, in actual UL transmission, the channel may be available after the UL burst or before the UL burst, so there are potential problems such as resource waste, inefficient transmission, etc. there is a possibility. In such a case, it is advantageous if additional UL subframes are allowed so that more subframes can be used for UL transmission in order to guarantee efficient transmission time in UL transmission.

  FIG. 19 schematically illustrates an exemplary scheduling scheme when a channel is available before the estimated gap T, according to one embodiment of the present disclosure. As shown in FIG. 19, if the channel is available before the UL burst, an additional UL subframe located just before the UL subframe used for UL transmission, ie, before the UL scheduled burst Can be scheduled. In such a case, the serving node, such as the eNB, transmits a UL grant that is more sufficient than requested, that is, UL bursts and UL grants for subframes 0-5. In this way, efficient transmission time can be guaranteed. On the other hand, it is preferred that the terminal device knows the expected transmission period or MCOT, since the terminal device can monitor the start of transmission and transmit accordingly within the UL MCOT. This ensures that the expected transmission period or MCOT will not be exceeded. The prediction information may be transmitted, for example, in DCI format 1C. Further, it is clear that the n + 2k + T mode can be replaced by the n + k + T + m 'mode.

  FIG. 20 schematically illustrates an exemplary scheduling scheme when a channel is available after an estimated gap, according to one embodiment of the present disclosure. As shown in FIG. 20, if the channel is available after the UL burst, schedule an additional UL subframe located immediately after the UL subframe used for UL transmission, ie, after the UL scheduled burst. be able to. Thus, in such a case, the serving node, such as the eNB, transmits a UL grant that is more sufficient than requested, that is, a UL grant for subframes 0-6. In this way, efficient transmission time can be guaranteed. In the meantime, it is preferred that the terminal knows the expected transmission period or MCOT, as the terminal can monitor the start of the transmission and transmit accordingly within the UL MCOT. This ensures that the expected transmission period or MCOT is not exceeded. Similarly, the prediction information may be transmitted, for example, in DCI format 1C. Further, it is clear that the n + 2k + T mode can be replaced by the n + k + T + m 'mode.

  FIGS. 20 and 21 are presented only to illustrate two methods of scheduling additional subframes, and the method of scheduling additional subframes is not limited to the illustrated scheduling scheme and is provided herein. For example, the present invention can be applied to any of the scheduling methods shown in FIGS. It is further understood that the additional UL subframe may be more than one subframe depending on when the channel is available. Further, it is understood that additional UL subframes can include partial subframes if partial subframe transmissions are allowed allowing UL transmissions to start and / or end partial subframes. Is done.

  It is understood that for the scheduling scheme described with reference to FIGS. 12-18, the indication of the scheduling mode may be similar to that of FIGS. 4-8, with the only difference being that the scheduling delay time or the scheduling timing Is changed.

  In particular, in embodiments where the number T of subframes in the gap is added to the required time delay k, similar to that shown in FIGS. 12 and 13, a similar representation is used to indicate different modified scheduling modes. Can be used. In the embodiment described with reference to FIGS. 14 and 15, the display 10 is used for n + k, the display 01 is used for n + k + (k−T), and the display 11 is used for n + k + 2 (k−T). . Or alternatively, the display 11 may be used for n + k, n + k + (k-T) and n + k + 2 (k-T). In addition, other possible combinations of two bits could be used to indicate these scheduling modes. As for the scheduling method, as shown in FIGS. 16 and 17, the display is similar to those of FIGS. 10 and 11.

  Note that steps 120-140 can be performed in any suitable manner, and they are limited to the sequence shown. Alternatively, they may be performed in a different order than they are, or may be performed simultaneously.

  FIG. 21 further schematically illustrates a flowchart of a method 2100 for performing UL transmission according to an embodiment of the present disclosure. According to embodiments of the present disclosure, method 2000 may be performed at a terminal device such as a UE or any other suitable device.

  As shown in FIG. 21, method 2100 starts at step 2110, where UL transmissions are performed based on a scheduling mode for UL scheduling. The scheduling mode can be a predetermined scheduling mode or a scheduling mode indicated by the UL scheduling mode display. If the scheduling mode is the predetermined scheduling mode, or if the scheduling mode is specific to the subframe structure, no mode indication is required.

  On the other hand, when the scheduling mode is determined in real time by the serving mode eNB, the serving mode can transmit an UL scheduling mode indication to the terminal device. Accordingly, in step 2120, method 2100 may further include receiving a UL scheduling mode indication indicating a scheduling mode of the UL scheduling. In such a case, the UL scheduling mode can be received in various ways. For example, the UL scheduling mode indication may be received by a UL index in the downlink control information format or, alternatively, by an additional bit in the downlink control information format.

  In an embodiment of the present disclosure, in UL scheduling, different terminal devices can use different scheduling modes having different scheduling delay time delays. In another embodiment of the present disclosure, in UL scheduling, a single terminal device may use different scheduling modes with different scheduling time delays.

  In embodiments of the present disclosure, different scheduling time delays may be determined based at least on a required time delay k between UL grant and UL transmission. The required time delay k may be a fixed value. Alternatively, it may be a variable value determined based on the number of DL subframes and the number of UL subframes. In such a case, at step S2130, method 2100 may further include receiving a time delay indication indicating the time delay k.

  In another embodiment of the present disclosure, the different scheduling time delays are the required time delay k between the UL grant and the UL transmission, the required time delay k, in order for the subframes in the UL transmission to be scheduled as much as possible. multiple of k, required time delay k and predetermined extension value, another multiple of required time delay k, required time delay k and multiple of predetermined extended time value, required time delay k and two or more variable And a combination of time delays with extension values.

  In embodiments of the present disclosure, different scheduling modes may be further determined based on the gap between DL transmission and UL transmission.

  In an embodiment of the present disclosure, the different scheduling modes include adding multiple subframes in the gap to the required time delay and all UL modes if the number of subframes in the gap is less than the required time delay. By using the latest Q DL subframe to schedule a subframe and / or using the last DL subframe to schedule all UL subframes Further determined, Q is the difference between the number of subframes in the gap and the required time delay.

  In embodiments of the present disclosure, to ensure efficient transmission time, additional UL subframes are allowed so that more subframes are used than required in UL transmission. In such a case, at step 2140, method 2100 further comprises receiving a transmission period indication indicating the permitted UL transmission period, wherein the UL transmission is performed during the permitted UL transmission period. The additional UL subframe is located immediately before or immediately after the UL subframe used for UL transmission.

  Note that, similar to steps 120-140 of FIG. 1, steps 2120-2140 may be performed in any suitable manner, and are limited to the illustrated sequence. Alternatively, they may be performed in a different order than they are, or may be performed simultaneously.

  FIG. 22 schematically illustrates a block diagram of an apparatus 2200 for performing UL scheduling according to an embodiment of the present disclosure. According to embodiments of the present disclosure, device 2200 may be implemented at a serving node, such as an eNB, or any other suitable device.

  In an embodiment of the present disclosure, the device 2200 may include the scheduling mode determining unit 2210. The scheduling mode determining unit 2210 is configured to determine at least two modes for UL scheduling based on the number of DL subframes and the number of UL subframes, wherein the at least two modes have different scheduling time delays. May be shown.

  In embodiments of the present disclosure, different scheduling time delays may be determined based at least on a required time delay between UL grant and UL transmission.

  In an embodiment of the present disclosure, the required time delay may be determined based on the number of DL subframes and the number of UL subframes.

  In an embodiment of the present disclosure, the method may further include a delay indication transmitter 2220, which may be configured to transmit a time delay indication indicating the time delay.

  In embodiments of the present disclosure, at least two modes can be used for different terminals. Or alternatively, at least two modes are used for a single terminal.

  In embodiments of the present disclosure, different scheduling time delays can be determined because the subframes in the UL transmission are scheduled as much as possible. The different scheduling time delays include the required time delay between UL grant and UL transmission, a multiple of the required time delay, the required time delay and a predetermined extension, another multiple of the required time delay, the required time delay and It can be selected from any of a multiple of the predetermined extension time value and a combination of a required time delay and a time delay comprising two or more variable extension values.

  In embodiments of the present disclosure, at least two modes for UL scheduling may be further determined based on a gap between DL transmission and UL transmission.

  In embodiments of the present disclosure, at least two modes for UL scheduling include adding multiple subframes in the gap to the required time delay, and wherein the number of multiple subframes in the gap is greater than the required time delay. If smaller, using the latest QDL subframe to schedule all UL subframes, and using the last DL subframe to schedule all UL subframes, Q is the difference between the number of subframes in the gap and the required time delay.

  In an embodiment of the present disclosure, the device may further include a period display transmission unit 2230. The period display transmission unit 2330 is configured to transmit a transmission period display indicating the permitted UL transmission period. In such a case, additional UL subframes are allowed to use more subframes than required in UL transmission to ensure efficient transmission time in UL transmission. In embodiments of the present disclosure, the additional UL subframe may be located immediately before or immediately after the UL subframe used for UL transmission.

  In an embodiment of the present disclosure, the device 2200 may further include a mode display transmission unit 2240. Mode indication transmitter 2240 may be configured to transmit a UL scheduling mode indication indicating at least two modes for UL scheduling. Mode indication transmitter 2240 may be configured to transmit the UL scheduling mode indication in many different ways. For example, the UL scheduling mode indication is transmitted by reusing the UL index in the downlink control information format. In another example, the UL scheduling mode indication may be sent by using an extra bit in the downlink control information format.

  FIG. 23 schematically illustrates a block diagram of an apparatus 2300 for performing UL transmission according to an embodiment of the present disclosure. Apparatus 2300 may be implemented at a terminal device such as a UE or any other suitable device.

  As shown in FIG. 23, the device 2300 can include a UL transmission execution unit 2310. The UL transmission execution unit 2310 may be configured to perform UL transmission based on a scheduling mode for UL scheduling, wherein the scheduling mode is a predetermined scheduling mode or a scheduling mode indicated by the UL scheduling mode display. is there.

  In an embodiment of the present disclosure, in UL scheduling, different terminal devices can use different scheduling modes having different scheduling delay time delays.

  In embodiments of the present disclosure, in UL scheduling, a single terminal may also use different scheduling modes with different scheduling time delays used by the single terminal.

  In embodiments of the present disclosure, different scheduling time delays may be determined based at least on a required time delay between UL grant and UL transmission.

  In an embodiment of the present disclosure, the device 2300 may further include a delay indication receiving unit 2320. Delay indication receiving section 2320 is configured to receive a required time delay indication indicating a predetermined time delay determined based on the number of DL subframes and the number of UL subframes.

  In embodiments of the present disclosure, the different scheduling time delays are the required time delay between UL grant and UL transmission, and a multiple of the required time delay, because the subframes in the UL transmission are scheduled as much as possible. A time delay comprising a required time delay and a predetermined extension value, another multiple of the required time delay, a multiple of the required time delay and the predetermined extended time value, and a required time delay and two or more variable extension values. And a combination.

  In embodiments of the present disclosure, different scheduling modes may be further determined based on the gap between DL transmission and UL transmission. For example, a different scheduling mode is to add multiple subframes in the gap to the required time delay and to schedule all UL subframes if the number of subframes in the gap is less than the required time delay. Using the latest Q DL subframe and / or using the last DL subframe to schedule all UL subframes, where Q is It is the difference between the number of subframes and the required time delay.

  In an embodiment of the present disclosure, the device may further include a period display receiving unit 2330. Period indication receiver 2330 may be configured to receive a transmission duration indication indicating an allowed UL transmission duration, and to ensure efficient transmission time, provide more sub-transmissions than required in UL transmission. Additional UL subframes are allowed so that the frame is used, and UL transmission is performed during the allowed UL transmission period.

  In some embodiments of the present disclosure, the additional UL subframe may be located immediately before the UL subframe used for UL transmission. In another embodiment of the present disclosure, the additional UL subframe may be located immediately after the UL subframe used for UL transmission.

  In an embodiment of the present disclosure, the device 2300 may further include a scheduling mode receiving unit 2340. The scheduling mode receiving unit 2340 may be configured to receive a UL scheduling mode indication indicating a scheduling mode for UL scheduling. In embodiments of the present disclosure, the UL scheduling mode indication may be received in many different ways. For example, the UL scheduling mode indication may be received by a UL index in the downlink control information format. Or, alternatively, the UL scheduling mode indication may be received by an additional bit in the downlink control information format.

  The apparatus 2200 and the apparatus 2300 have been briefly described above with reference to FIGS. Note that devices 2200 and 2300 may be configured to implement the functions as described with reference to FIGS. Thus, for details of the operation of the modules in these devices, reference can be made to the description of each step of the method described with reference to FIGS.

  Further, it is noted that components of devices 2200 and 2300 may be embodied in hardware, software, firmware, and / or any combination thereof. For example, the components of the devices 2200 and 2300 may be implemented by circuits, processors, or any other suitable selection devices, respectively. Further, those skilled in the art will appreciate that the above examples are not intended to be limiting and the present disclosure is not so limited. Many variations, additions, deletions and modifications can be readily derived from the disclosure provided herein, and all such variations, additions, deletions and modifications fall within the protection scope of the present disclosure.

  Further, in some embodiments of the present disclosure, devices 2200 and 2300 can include at least one processor. At least one processor suitable for use with the embodiments of the present disclosure can include, for example, both general purpose and special purpose processors, known or later developed. Devices 2200 and 2300 can further comprise at least one memory. The at least one memory can include, for example, a semiconductor memory device such as a RAM, a ROM, an EPROM, an EEPROM, a flash memory device, and the like. At least one memory may be used to store a program of computer-executable instructions. The program may be written in any high and / or low level compatible or interpretable programming language. According to embodiments, the computer-executable instructions may be configured to cause at least one processor to cause the devices 2200 and 2300 to perform operations according to at least the methods described with reference to FIGS. .

  FIG. 24 further illustrates a device 2410 that may be embodied in or included in a terminal device such as a UE for a wireless network in a wireless network and a base station such as an NB or eNB described herein. Shows a simplified block diagram of an apparatus 2420 embodied in or included in FIG.

  The apparatus 2410 includes at least one processor 2411, such as a data processor (DP), and at least one memory (MEM) 2412 coupled to the processor 2411. Apparatus 2410 may further include a transmitter TX and a receiver RX2413 coupled to processor 2411, which may be operable to communicatively connect to apparatus 2420. The MEM 2412 stores a program (PROG) 2414. The PROG 2414 may include instructions that, when executed on the associated processor 2411, enable the device 2410 to operate, for example, to perform the method 2100 according to embodiments of the present disclosure. The combination of at least one processor 2411 and at least one MEM 2412 can form a processing means 2415 adapted to implement various embodiments of the present disclosure.

  Apparatus 2420 includes at least one processor 2421, such as a DP, and at least one MEM 2422 coupled to processor 2421. Device 2420 may further include a suitable TX / RX 2423 coupled to processor 2421, which may be operable for wireless communication with device 2410. The MEM 2422 stores the PROG 2424. The PROG 2424 may include instructions that, when executed on the associated processor 2421, enable the device 2420 to operate in accordance with embodiments of the present disclosure, for example, to perform the method 100. The combination of at least one processor 2421 and at least one MEM 2422 can form a processing means 2425 adapted to implement various embodiments of the present disclosure.

  Various embodiments of the present disclosure may be implemented by an executable computer program by one or more of the processors 2411, 2421, software, firmware, hardware, or a combination thereof.

  The MEMs 2412 and 2422 may be of any type suitable for the local technology environment and examples of these, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed and removable memory But may be implemented using any suitable data storage technology.

  Processors 2411 and 2411 may be of any type suitable for the local technology environment, and may include one or more of a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor DSP, and a processor based on a multi-core processor architecture. As such, those not limited to these examples may be included.

  In addition, the present disclosure can also provide a carrier that includes a computer program as described above, which is one of an electronic signal, an optical signal, a wireless signal, or a computer-readable storage medium. The computer-readable storage medium is, for example, an optical compact disk or an electronic memory device such as a random access memory (RAM), a read only memory (ROM), a flash memory, a magnetic tape, a CD-ROM, a DVD, and a blue-ray disk. .

  The techniques described herein may be implemented by various means, and as a result, an apparatus that implements one or more functions corresponding to the apparatus described in one embodiment may be implemented solely by prior art means. Rather, it may include means for implementing one or more functions corresponding to the devices described in the embodiments, configured to perform separate means for each separate function, or to perform two or more functions. May be provided. For example, these techniques may be implemented in hardware (one or more devices), firmware (one or more devices), software (one or more modules), or a combination thereof. In the case of firmware or software, implementation may be through modules (eg, procedures, functions, and so on) that perform the functions described herein.

  The exemplary embodiments herein are described above with reference to block diagrams and flowchart diagrams of methods and apparatus. It will be understood that each block of the block diagrams and flowchart diagrams, and combinations of blocks in the block diagrams and flowchart diagrams, respectively, can be implemented by various means including computer program instructions. These computer program instructions are executed on a computer or other programmable data processing device, such that the instructions create a means for performing the specified function in a flowchart or block, a general purpose computer, a special purpose computer, Or it can be loaded into another programmable data processing device to create a machine.

  Although this specification contains many specific implementation details, these should not be construed as limiting the scope of the implementation or the scope that may be claimed, and are not intended to limit a particular implementation of a particular implementation. Should be interpreted as a description of the functionality specific to. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable sub-combination. Furthermore, features have been described above as operating in a particular combination, and even though originally so claimed, one or more features from the claimed combination may be cut away from the combination, as the case may be. And the claimed combinations may be directed to sub-combinations or sub-combination variations.

  It will be apparent to those skilled in the art that as technology advances, the inventive concept may be implemented in a variety of ways. The embodiments described above are provided for the purpose of explanation and not limitation of the disclosure, and modifications and variations can be made without departing from the spirit and scope of the present disclosure, as those skilled in the art will readily understand. Please understand that. Such modifications and variations are considered to be within the scope of the disclosure and the appended claims. The scope of protection of the present disclosure is defined by the appended claims.

Claims (8)

In subframe n, DCI (Downlink Control Information) indicating a first parameter with a first value and a second parameter with a second value of the number of subframes, and a license-free spectrum. Receiving the DCI for scheduling a PUSCH in each of the plurality of subframes from a base station,
Whether the offset from the subframe n is equal to a predetermined value of 4 or whether the offset value is an offset value determined by the base station is based on the first value,
Performing a corresponding PUSCH transmission in the plurality of subframes based on the offset;
A method performed by the user equipment.   The method of claim 1, wherein the PUSCH transmission is coordinated on a channel access procedure for accessing a channel on the unlicensed spectrum.   The method according to claim 1 or 2, wherein the PUSCH transmission starts within a symbol of a subframe.   The method according to one of claims 1 to 3, wherein the PUSCH transmission occupies one or more consecutive subframes. In subframe n, DCI (Downlink Control Information) indicating a first parameter with a first value and a second parameter with a second value of the number of subframes, and a license-free spectrum. Transmitting the DCI for scheduling a PUSCH in each of the plurality of subframes to a user equipment,
Whether the offset from the subframe n is equal to a predetermined value of 4 or an offset value determined by the base station is based on the first value,
Receiving a corresponding PUSCH transmission in the plurality of subframes based on the offset;
A method performed by a base station.   The method of claim 5, wherein the PUSCH transmission is coordinated on a channel access procedure for accessing a channel on the unlicensed spectrum. The PUSCH transmission starts within a symbol of a subframe;
The method according to claim 5.   The method according to any one of claims 5 to 7, wherein the PUSCH transmission occupies one or more consecutive subframes.

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