JP7076502B2 - Base stations, communication methods, integrated circuits, and terminals - Google Patents

Description

The present invention relates to the field of wireless communication, and particularly to user equipment (UE: User Equipment) and wireless communication method for Licensed-Assisted Access (LAA).

The proliferation of mobile data has forced operators to utilize finite frequency spectra with ever-increasing efficiency. On the other hand, many unlicensed frequency spectra are used with low efficiency only by Wi-Fi, Bluetooth® and the like. LTE-U (LTE-Unlicensed) and Licensed-Assisted Access (LAA) have allowed the LTE spectrum to be extended to unlicensed bands that can directly and dramatically increase LTE network capacity.

3GPP TS36.213 (3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures)

An exemplary embodiment that does not limit the invention provides an approach that increases the likelihood that a PUSCH can be sent after a listen before talk (LBT) in a scheduled subframe.

The base station according to the embodiment of the present disclosure includes a transmitter that transmits an uplink grant indicating a time resource composed of a plurality of symbols for uplink transmission, and a plurality of position candidates in the time resource. It comprises a receiver that receives a Physical Uplink Shared CHannel (PUSCH) transmitted from one position of the plurality of symbols, the plurality of symbols being 14 symbols, and the plurality of position candidates being the first symbol in the time resource. At the beginning of the eighth symbol, the receiver receives the PUSCH data generated by the same transport block size in any of the plurality of position candidates.

A communication method according to an embodiment of the present disclosure includes a step of transmitting an uplink grant indicating a time resource composed of a plurality of symbols for uplink transmission, and a plurality of position candidates in the time resource. It comprises a step of receiving a Physical Uplink Shared CHannel (PUSCH) transmitted from one position, the plurality of symbols being 14 symbols, and the plurality of position candidates being the first symbol and the eighth in the time resource. It is the beginning of the symbol of, and in any of the plurality of position candidates, the data of the PUSCH generated by the same transport block size is received.

An integrated circuit according to an embodiment of the present disclosure includes a process of transmitting an uplink grant indicating a time resource composed of a plurality of symbols for uplink transmission, and a process of transmitting an uplink grant among a plurality of position candidates in the time resource. It controls the process of receiving the Physical Uplink Shared CHannel (PUSCH) transmitted from one position, the plurality of symbols are 14 symbols, and the plurality of position candidates are the first symbol and 8 in the time resource. It is the beginning of the second symbol and receives the data of the PUSCH generated by the same transport block size in any of the plurality of position candidates.

It should be noted that the general or specific embodiments may be implemented as a system, method, integrated circuit, computer program, storage medium, or any optional combination thereof.

Further benefits and advantages of the disclosed embodiments will be apparent from the specification and drawings. These benefits and / or benefits can be obtained individually by the various embodiments and features herein and in the drawings, and embodiments are made for the purpose of obtaining one or more of such benefits and / or benefits. And it is not necessary to provide all the features.

The above and other features of the invention will be further clarified from the following description and the appended claims, which are to be construed with the accompanying drawings. It should be noted that these drawings only show some embodiments of the present invention and therefore these drawings are not considered to limit the scope of the present disclosure. The present invention will be described in more detail and in detail by using the accompanying drawings.

It is a schematic diagram which shows the situation which the partial subframe is adopted. It is a flowchart of the wireless communication method which concerns on embodiment of this invention. It is a schematic block diagram of the UE which concerns on embodiment of this invention. It is a schematic diagram of an embodiment of the present invention in which there are two starting position candidates for PUSCH in the subframe. It is a schematic diagram of RE mapping which concerns on embodiment of this invention. It is a figure which shows schematically the formation of the PUSCH of 1 slot length by using the frequency hopping in a subframe which concerns on embodiment of this invention. It is a figure which shows the formation of the PUSCH of 1-slot length by using the mapping for 2-slot PUSCH which concerns on embodiment of this invention. It is a schematic diagram of an exemplary UL subframe structure according to an embodiment of the present invention. It is a diagram schematically showing a burst having a partial subframe at the end of the burst to occupy the entire burst.

In the following detailed description, reference is made to the accompanying drawings, which form part of the description. In drawings, unless otherwise specified, similar symbols basically represent similar elements. It should be noted that each aspect of the invention can be arranged, substituted, combined and designed in a variety of different configurations, all of which are expressly intended and form part of the present disclosure. Will be easily understood.

Unlike distributed coordination systems such as WiFi, LTE is an eNB-centric system in which both downlink data transmission and uplink data transmission are scheduled by the eNB. UL grants for Physical Uplink Shared CHannel (PUSCH) should be transmitted before the allowed subframe (eg, 4 ms before the allowed subframe). On the other hand, according to some regional requirements such as Europe, the transmitting side (which can be either eNB or UE) is required to listen before talk (LBT: Listen Before Talk). The UL grant was sent because the LBT result in the allowed subframes was not known at the time of the UL grant transmission, but the scheduling overhead and delay increased if the UE was unable to acquire the channel due to an LBT failure. do.

In a scheduled subframe, to increase the possibility that the PUSCH can be transmitted after the LBT, a PUSCH that can be flexibly started at a position within the scheduled subframe of the target of the LBT is introduced. Hereinafter, a subframe shorter than a normal subframe is referred to as a partial subframe, and a PUSCH conveyed by the partial subframe is referred to as a partial PUSCH. FIG. 1 is a schematic diagram showing a situation in which a partial subframe is adopted. As shown in FIG. 1, the UL grant is sent from the eNB to the UE before the scheduled subframe. The UE is doing the LBT just before the scheduled subframe, but the LBT is failing (ie, the channel is busy). In this case, the UE cannot send the PUSCH from the first boundary of the scheduled subframe. In this case, the UE may re-run the LBT within the scheduled subframe. For example, as shown in FIG. 1, if the LBT within a scheduled subframe is successful, according to the present invention, from a position within the scheduled subframe (eg, of the scheduled subframe). PUSCH can be transmitted (from the beginning of the second slot). The PUSCH can end at the end boundary of the scheduled subframe. A PUSCH that starts at a certain position in a scheduled subframe and ends at the end boundary of the scheduled subframe is shorter than one subframe, which can be referred to as a partial PUSCH.

According to an embodiment of the present invention, a wireless communication method for LAA is provided. FIG. 2 is a flowchart of the wireless communication method 200. The wireless communication method 200 can be performed by the UE, and the wireless communication method 200 can include steps 201 to 203. In step 201, the UE receives a UL grant scheduling a subframe for UL transmission. UL grants can be transmitted by eNB. In step 202, the UE performs a listen before talk (LBT: Listen Before Talk). In step 203, if the LBT is successful, the UE transmits a PUSCH starting from one available start position of the plurality of start position candidates in the scheduled subframe in the scheduled subframe. In particular, the PUSCH in this case is the first PUSCH transmitted during the burst, and this first transmitted PUSCH can end at the end boundary of the scheduled subframe. According to this embodiment, the UE selects the PUSCH start position from the available candidate positions after the successful LBT. For example, the UE can send a PUSCH immediately after a successful LBT. If necessary, another signal (for example, a preamble, a reserved signal, etc.) can be transmitted before the PUSCH. If there are no candidate positions available after the LBT, or if the LBT is unsuccessful within the scheduled subframe, the UE will not send a PUSCH in the scheduled subframe.

In addition, an embodiment of the present invention provides a UE for LAA for performing the above communication method. FIG. 3 is a schematic block diagram of the UE 300 according to the embodiment of the present invention. The UE 300 is scheduled with a receiver 301 that operates to receive a UL grant that schedules a subframe for UL transmission, a first circuit 302 that operates to perform an LBT, and if the LBT is successful. A transmission unit 303 that operates to transmit a first PUSCH starting from one available start position of a plurality of start position candidates in the subframe can be provided in the scheduled subframe.

In the UE 300 according to the present invention, a central processing unit (CPU) 310 for executing related programs to process various data and controlling the operation of each unit in the UE 300, and the CPU 310 includes various processes and various processes. Random access memory (ROM: Read Only Memory) 313 for storing various programs required for control, and random for temporarily storing intermediate data generated during the process and control by the CPU 310. It may optionally have an access memory (RAM: Random Access Memory) 315 and / or a storage device 317 for storing various programs, data, and the like. The receiving unit 301, the first circuit 302, the transmitting unit 303, the CPU 310, the ROM 313, the RAM 315, and / or the storage device 317 and the like can be connected to each other via the data bus and / or the command bus 320, and signals each other. Can be transferred.

Each of the above components does not limit the scope of the invention. According to one embodiment of the present invention, the functions of the receiving unit 301, the first circuit 302, and the transmitting unit 303 may be realized by hardware, and the ROM 313, the RAM 315, and / or the storage device 317 are unnecessary. May be. Alternatively, the functions of the receiving unit 301, the first circuit 302, and the transmitting unit 303 may be realized by functional software in combination with the CPU 310, ROM 313, RAM 315, and / or the storage device 317 and the like.

As mentioned above, in one scheduled subframe according to the UL grant sent by the eNB, the PUSCH can start at multiple predefined positions. In the UE, after a successful LBT in the scheduled subframe, the UE initiates transmission of the PUSCH at one of the available predefined positions. Therefore, it is more likely that the PUSCH can be transmitted after the LBT in the scheduled subframe.

In one embodiment, there can be two start position candidates in the scheduled subframe, each of which is at the start of two slots in the scheduled subframe. Therefore, there are two PUSCH candidates corresponding to the two start position candidates, the first PUSCH candidate (partial PUSCH) of the two PUSCH candidates has one slot length, and the second PUSCH candidate (usually) of the two PUSCH candidates. PUSCH) has a length of 2 slots.

FIG. 4 is a schematic diagram of an embodiment in which there are two start position candidates for PUSCH in the subframe. As shown in FIG. 4, one UL grant from the eNB schedules one PUSCH of two different lengths (ie, 1 slot length or 2 slot length) into a scheduled subframe. And this PUSCH can always end at the end boundary of the scheduled subframe. The UE selects the PUSCH start position from the available candidate positions after the LBT is successful. If necessary, another signal (for example, a preamble, a reserved signal, etc.) can be transmitted before the PUSCH. If there are no candidate positions available after the LBT, or if the LBT is unsuccessful within the scheduled subframe, the UE will not send a PUSCH in the scheduled subframe.

Since the length of the PUSCH is unpredictable when the UL grant is sent, it may be necessary to prepare multiple PUSCHs (one slot length or two slot lengths) that may have two different lengths. According to the current UL Grant (LTE Release 13), the UE is notified of the RB allocation, MCS, and number of transport blocks. Depending on the expected length of the PUSCH, the number of REs for PUSCH transmission can be obtained individually.

個のＲＢが割り当てられるものとする（「Ｎ」は、ＵＬグラントにおいて通知された割り当てられるＲＢ数である））。換言すれば、一実施形態では、ＵＥは、２つのＰＵＳＣＨ候補それぞれのための２つのトランスポートブロックを準備するように動作する第２の回路を備えることができ、この場合、第２のＰＵＳＣＨ候補（通常のＰＵＳＣＨ）にはＮ個のＲＢが割り当てられるものとし、第１のＰＵＳＣＨ候補（パーシャルＰＵＳＣＨ）には

個のＲＢが割り当てられるものとする（「Ｎ」は、ＵＬグラントにおいて通知された割り当てられるＲＢ数である）。あるいは、第２のオプションでは、パーシャルＰＵＳＣＨのためにＵＬグラントの中のＭＣＳを解釈し直して（例えば、変調次数および／または符号化率を大きくして）、トランスポートブロックを１つ準備する。換言すれば、一実施形態では、ＵＥは、２つのＰＵＳＣＨ候補のための１つのトランスポートブロックを準備するように動作する第２の回路を備えることができ、この場合、ＵＬグラントにおいて通知された変調・符号化方式（ＭＣＳ：Modulation and Coding Scheme）は、第１のＰＵＳＣＨ候補のために解釈し直される。 There can be two approaches regarding the size of the transport block. The first option is to prepare two transport blocks according to the length of each PUSCH (it is assumed that N RBs are assigned to a normal PUSCH and a partial PUSCH is assigned).

It is assumed that RBs are assigned (“N” is the number of assigned RBs notified in the UL Grant)). In other words, in one embodiment, the UE can include a second circuit that operates to prepare two transport blocks for each of the two PUSCH candidates, in this case a second PUSCH candidate. It is assumed that N RBs are assigned to (normal PUSCH), and the first PUSCH candidate (partial PUSCH) is assigned.

It is assumed that RBs are assigned (“N” is the number of assigned RBs notified in the UL Grant). Alternatively, the second option reinterprets the MCS in the UL grant for the partial PUSCH (eg, increasing the modulation order and / or code rate) to prepare one transport block. In other words, in one embodiment, the UE may include a second circuit that operates to prepare one transport block for two PUSCH candidates, in this case notified by UL Grant. The Modulation and Coding Scheme (MCS) is reinterpreted for the first PUSCH candidate.

With respect to RE mapping, the current RE mapping (as shown in FIG. 5, the first PUSCH data mapping in time, the RS, CQI / PMI, ACK / NACK, RI of the PUSCH) for each slot and each time the TBS is determined. Included) can be reused for one slot length partial PUSCH.

Current intra-subframe frequency hopping for PUSCH provides two slots in different frequency bands. FIG. 6 is a diagram schematically showing the formation of a PUSCH having a slot length by using in-subframe frequency hopping according to an embodiment of the present invention. As shown on the left side of FIG. 6, the first slot (slot 0) of all assigned RBs is mapped in one subband, and the second slot (slot 1) of all assigned RBs is the sub. It is mapped to another subband (a subband within the same bandwidth as the above subband) separated by several RBs from the band. Then, as shown on the right side of FIG. 6, the RB assigned to slot 0 and the RB assigned to slot 1 are combined into one slot (slot 1) to obtain a PUSCH having a length of one slot. Can be done. That is, in the time domain, the plurality of assigned RBs are put into one slot, and in the frequency domain, these RBs can be continuously arranged in the original order. In other words, in one embodiment, the UE combines an RB assigned to slot 0 of a two-slot length PUSCH and an RB assigned to slot 1 in one slot using intra-frame frequency hopping. A third circuit can be provided that operates to form a first PUSCH candidate.

個ずつあるＰＵＳＣＨ用のマッピングを使用することができる（「Ｎ」は、ＵＬグラントにおいて通知された割り当てられるＲＢ数である）。図７は、本発明の実施形態に係る、２スロットＰＵＳＣＨ用のマッピングを使用することによる１スロット長のＰＵＳＣＨの形成を概略的に示す図である。Ｎが偶数であることが想定される図７に示されるように、第１のステップにおいて、各スロットにＲＢがＮ／２個ずつある２スロットＰＵＳＣＨのＲＥマッピングが行われ、第２のステップにおいて、２つのスロットの各ＲＢが１つのスロットの２つの隣接したＲＢにマッピングされる。Ｎが偶数である場合、割り当てられたＲＢのすべてを１スロット長のＰＵＳＣＨによって使用可能である。Ｎが奇数である場合、割り当てられたＲＢの１つが１スロット長のＰＵＳＣＨによって使用されない場合がある。この実施形態によれば、ＵＥは、２つのスロットにＲＢが

個ずつある２スロット長のＰＵＳＣＨ用のマッピングを使用することによって１つのスロットにＲＢがＮ個ある第１のＰＵＳＣＨ候補を形成するように動作する第３の回路を備えることができ、この場合、２つのスロットの各ＲＢは、１つのスロットの２つの隣接したＲＢにマッピングされる。 Alternatively, because there are N RBs in one slot and one sPUSCH (shortened PUSCH), there are RBs in two slots.

You can use individual mappings for PUSCH (“N” is the number of assigned RBs notified in the UL Grant). FIG. 7 is a diagram schematically showing the formation of a PUSCH having a length of 1 slot by using a mapping for a 2-slot PUSCH according to an embodiment of the present invention. As shown in FIG. 7, where N is assumed to be an even number, RE mapping of a 2-slot PUSCH with N / 2 RBs in each slot is performed in the first step, and in the second step. Each RB in the two slots is mapped to two adjacent RBs in one slot. If N is even, all of the assigned RBs can be used by one slot length PUSCH. If N is odd, one of the assigned RBs may not be used by one slot length PUSCH. According to this embodiment, the UE has RBs in two slots.

A third circuit can be provided that operates to form a first PUSCH candidate with N RBs in one slot by using mappings for PUSCHs of two slot lengths, one on each. Each RB in the two slots is mapped to two adjacent RBs in one slot.

As mentioned above, RE mapping, TBS determination, and in-subframe hopping can be reused to the UE transceiver by using slot-level start position candidates (ie, two start position candidates). Modifications / UE transceivers can be complicated and the impact of specifications can be minimized. The second circuit and the third circuit can be realized by hardware or functional software similar to the first circuit 302.

In other embodiments, the starting position candidate can be at the symbol level. One UL grant from eNB can be up to 14 different lengths (ie, 1 to 14 Single-Carrier Frequency Division Multiple Access (SC-FDMA) symbols). PUSCH can be scheduled within a scheduled subframe (eg, at the four start positions of symbols 0, 4, 7, or 11 for normal cyclic prefixes). The Sounding Reference Signal (SRS) symbol (the last SC-FDMA symbol in the uplink subframe) may be excluded in the SRS subframe. After a successful LBT, the UE selects one available PUSCH start position. For this embodiment, the PUSCH should be prepared with multiple possible lengths and a new TBS determination (eg, scale factor) based on the length of the PUSCH excluding 13 and 14 symbol lengths. is necessary. In the current transport block size table defined in Non-Patent Document 1, a normal PUSCH of 14 symbols or 12 symbols is assumed depending on the length of the cyclic prefix (CP). Therefore, PUSCH with a smaller number of SC-FDMA symbols may have a scale factor applied to the current TBS depending on the number of REs in the PUSCH data. For example, the scale factor can be obtained by the number of SC-FDMA symbols of PUSCH divided by 14. Also, except for the 14 symbol length, new RE mapping starting from the first SC-FDMA symbol of PUSCH is required. UL subframe structure in a licensed carrier as shown in FIG. 8, where the RS of the PUSCH is always in a predefined symbol position (ie, symbol 3 or 10 for a normal CP, extended CP). In the case of, one of the approaches is to reuse the current UL subframe structure aligned with the symbol 2 or 8). In this approach, PUSCH's SC-FDMA symbols in the current UL subframe structure are truncated from the beginning. Long Block (LB) is equal to the SC-FDMA symbol. Another approach is to shift the UL subframe structure, i.e., to shift all SC-FDMA symbols from left to right in FIG. In this approach, the UL subframe structure is truncated from the end. For PUSCHs of 13SC-FDMA length starting from the second SC-FDMA symbol, shift to the right by 1SC-FDMA symbol from the current subframe with SRS (within the last SC-FDMA symbol of the current uplink subframe). DMRS is required.

In another embodiment, the transmitter of the UE can further operate to transmit a second PUSCH ending at the end of the burst. In the present invention, the "first" and "second" of the "first PUSCH" and the "second PUSCH" do not limit the order of the PUSCHs, and simply distinguish one PUSCH from the other. Is. Based on regional regulations, the maximum burst length can be limited (eg, limited to 4 ms in Japan and 10 ms in Europe). If there is a partial subframe at the beginning of a single UL burst (consisting of at least one UE uplink transmission signal), it is beneficial for the partial subframe at the end to reach the maximum allowed occupancy time (usually 1 ms particle size). sell. There can be multiple approaches to scheduling partial subframes at the end of a burst. For example, one approach is to independently schedule partial subframes at the end of a burst by individual UL grants like other subframes, and another approach is as shown in FIG. Some have implicitly scheduled a partial subframe at the end of the burst by a UL grant for the partial subframe at the beginning of the burst for the same UE. FIG. 9 is a diagram schematically showing a burst having a partial subframe at the end of the burst to occupy the entire burst. As shown in FIG. 9, the partial subframes at the end of the burst are not explicitly scheduled by the individual UL grants, but implicitly by the UL grants for the partial subframes at the beginning of the burst. There is. In other words, if the first scheduled subframe of the burst is a partial subframe, then the end of the burst partial subframe is implicitly scheduled.

In another embodiment, if the UE is scheduled consecutively to two or more subframes, the uplink partial subframes are scheduled and / or encoded along with the regular subframes adjacent to the uplink partial subframes. can do. If the uplink partial subframe is at the beginning of a burst, the normal subframe adjacent to the uplink partial subframe is the next subframe. If the uplink partial subframe is at the end of the burst, the normal subframe adjacent to the uplink partial subframe is the preceding normal subframe. For example, if the first PUSCH described above does not start at the first boundary of the scheduled subframe, the scheduled subframe can be encoded with the next subframe of the scheduled subframe. If the second PUSCH above does not end at the end boundary of the last subframe of the burst, then the last subframe can be encoded with the subframe before the last subframe.

The present invention can be realized by software, hardware, or software that works with hardware. Each functional block used in the description of each of the above embodiments can be realized by an LSI which is an integrated circuit, and each process described in each embodiment can be controlled by an LSI. The LSIs may be individually formed as chips, or one chip may be formed so as to include a part or all of functional blocks. The LSI may have a data input unit and a data output unit coupled to the LSI. In the present specification, the LSI may be referred to as an IC, a system LSI, a super LSI, or an ultra LSI depending on the degree of integration. The method of making an integrated circuit is not limited to LSI, and can be realized by a dedicated circuit or a general-purpose processor. Further, a field programmable gate array (FPGA) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.

It should be noted that the invention is intended to be variously modified or modified by one of ordinary skill in the art based on the description presented herein and known art without departing from the spirit and scope of the invention. Modifications and applications fall within the scope of the protected claims. Further, the components of the above-described embodiments can be arbitrarily combined without departing from the spirit of the present invention.

Embodiments of the present invention can provide at least the following subjects.
1. 1. A receiver that operates to receive UL grants that schedule subframes for Uplink (UL) transmission, and
The first circuit that operates to perform listen-before-talk (LBT: Listen-Before-Talk), and
If the LBT is successful, the first physical uplink shared CHannel (PUSCH) starting from one available start position of the plurality of start position candidates in the scheduled subframe, said. A transmitter that operates to transmit in a scheduled subframe.
User device for Licensed-Assisted Access (LAA).

2. 2. The first PUSCH ends at the end boundary of the scheduled subframe.
The user device according to 1.

3. 3. Within the scheduled subframe, there are two start position candidates at the start points of each of the two slots of the scheduled subframe, and there are two PUSCH candidates corresponding to the two start position candidates. The first PUSCH candidate of the two PUSCH candidates has a slot length, and the second PUSCH candidate of the two PUSCH candidates has a two-slot length.
2. The user device according to 2.

個のＲＢが割り当てられるものとし、Ｎは、前記ＵＬグラントにおいて通知された割り当てられるＲＢ数である、
３に記載のユーザ機器。 4. Further comprising a second circuit operating to prepare two transport blocks for each of the two PUSCH candidates.
It is assumed that N resource blocks (RB: Resource Blocks) are assigned to the second PUSCH candidate, and the first PUSCH candidate is assigned.

It is assumed that RBs are assigned, and N is the number of assigned RBs notified in the UL grant.
The user device according to 3.

5. Further comprising a second circuit operating to prepare one transport block for the two PUSCH candidates.
The modulation and coding scheme (MCS) notified in the UL grant is reinterpreted for the first PUSCH candidate.
The user device according to 3.

6. The RB assigned to slot 0 of a two-slot length PUSCH and the RB assigned to slot 1 are combined in one slot using intra-frame frequency hopping to form the first PUSCH candidate. Further equipped with a working third circuit,
The user device according to 3.

個ずつある２スロット長のＰＵＳＣＨ用のマッピングを使用することによって１つのスロットにＲＢがＮ個ある前記第１のＰＵＳＣＨ候補を形成するように動作する第３の回路をさらに備え、２つのスロットの各ＲＢは、１つのスロットの２つの隣接したＲＢにマッピングされる、
３に記載のユーザ機器。 7. RB in 2 slots

It further comprises a third circuit that operates to form the first PUSCH candidate with N RBs in one slot by using mappings for PUSCHs of two slot lengths, one on each slot. Each RB maps to two adjacent RBs in one slot,
The user device according to 3.

8. The start position candidate is a symbol-level position.
The user device according to 1.

9. If the first PUSCH does not start at the first boundary of the scheduled subframe, then the scheduled subframe is encoded with the next subframe of the scheduled subframe.
The user device according to 1.

10. The transmitter further operates to transmit a second PUSCH ending at the end of the burst.
The user device according to 1.

11. If the second PUSCH does not end at the end boundary of the last subframe of the burst, then the last subframe is encoded with the subframe before the last subframe.
10. The user device according to 10.

12. A step to receive a UL grant that schedules a subframe for uplink (UL) transmission, and
Steps to perform a listen-before-talk (LBT: Listen-Before-Talk),
If the LBT is successful, the first physical uplink shared CHannel (PUSCH) starting from one available start position of the plurality of start position candidates in the scheduled subframe, said. A wireless communication method for Licensed-Assisted Access (LAA) performed by a user device, including a step of transmitting in a scheduled subframe.

13. The first PUSCH ends at the end boundary of the scheduled subframe.
12. The wireless communication method according to 12.

14. The scheduled subframe has two start position candidates at the start points of the two slots of the scheduled subframe, and two PUSCH candidates corresponding to the two start position candidates. The first PUSCH candidate of the two PUSCH candidates has a slot length, and the second PUSCH candidate of the two PUSCH candidates has a two-slot length.
13. The wireless communication method according to 13.

個のＲＢが割り当てられるものとし、Ｎは、前記ＵＬグラントにおいて通知された割り当てられるＲＢ数である、
１４に記載の無線通信方法。 15. It further comprises the step of preparing two transport blocks for each of the two PUSCH candidates.
It is assumed that N resource blocks (RB: Resource Blocks) are assigned to the second PUSCH candidate, and the first PUSCH candidate is assigned.

It is assumed that RBs are assigned, and N is the number of assigned RBs notified in the UL grant.
14. The wireless communication method according to 14.

16. Further including the step of preparing one transport block for the two PUSCH candidates,
The modulation and coding scheme (MCS) notified in the UL grant is reinterpreted for the first PUSCH candidate.
14. The wireless communication method according to 14.

17. The step of forming the first PUSCH candidate by combining the RB assigned to slot 0 of the PUSCH having a two-slot length and the RB assigned to slot 1 in one slot using intra-frame frequency hopping. The wireless communication method according to 14, further comprising.

個ずつある２スロット長のＰＵＳＣＨ用のマッピングを使用することによって１つのスロットにＲＢがＮ個ある前記第１のＰＵＳＣＨ候補を形成するステップをさらに含み、２つのスロットの各ＲＢは、１つのスロットの２つの隣接したＲＢにマッピングされる、
１４に記載の無線通信方法。 18. RB in 2 slots

Each RB in the two slots further comprises the step of forming the first PUSCH candidate with N RBs in one slot by using a mapping for PUSCHs of two slot lengths, one for each. Mapped to two adjacent RBs,
14. The wireless communication method according to 14.

19. The start position candidate is a symbol-level position.
12. The wireless communication method according to 12.

20. If the first PUSCH does not start at the first boundary of the scheduled subframe, then the scheduled subframe is encoded with the next subframe of the scheduled subframe.
12. The wireless communication method according to 12.

21. Further including a step of transmitting a second PUSCH ending at the end of the burst,
12. The wireless communication method according to 12.
22. If the second PUSCH does not end at the end boundary of the last subframe of the burst, then the last subframe is encoded with the subframe before the last subframe.
21. The wireless communication method.

Also, embodiments of the present disclosure can provide integrated circuits with modules for performing steps in each of the above communication methods. Further, an embodiment of the present disclosure is a computer-readable storage medium in which a computer program including a program code is stored, and when the program code is executed in a computing device, the program code is the above-mentioned communication method. A computer-readable storage medium, which can perform steps, can be provided.

Claims (20)

A transmitter that sends an uplink grant that indicates a time resource consisting of multiple symbols for uplink transmission, and a transmitter.
A receiver that receives a Physical Uplink Shared CHannel (PUSCH) transmitted by all symbols in the time resource or all symbols in the middle to the end of the time resource .
The receiver receives the data of the PUSCH generated by the same transport block size in any case of all the symbols in the time resource and all the symbols in the middle to the end of the time resource .
base station. The PUSCH ends at least at the boundary in the time resource.
The base station according to claim 1. The time resource is notified before the result of Listen-Before-Talk (LBT) in the terminal is obtained.
The base station according to claim 1. If the channel is busy, the channel access by Listen-Before-Talk (LBT) on the terminal will fail,
The base station according to claim 1. If the channel access by Listen-Before-Talk (LBT) in the terminal fails, the LBT is performed again in the time resource.
The base station according to claim 1. Based on the result of channel access by Listen-Before-Talk (LBT) in the terminal , all symbols in the time resource or all symbols in the middle to the end of the time resource are determined.
The base station according to claim 1. The time resource is a subframe,
The base station according to claim 1. Receiving the PUSCH using Licensed-Assisted Access (LAA),
The base station according to claim 1. A step to send an uplink grant that indicates a time resource consisting of multiple symbols for uplink transmission, and
A step of receiving a Physical Uplink Shared CHannel (PUSCH) transmitted by all symbols in the time resource or all symbols in the middle to the end of the time resource .
In any case of all the symbols in the time resource and all the symbols in the middle to the end of the time resource, the data of the PUSCH generated by the same transport block size is received.
Communication method. The process of sending an uplink grant that indicates a time resource consisting of multiple symbols for uplink transmission, and
Controls the process of receiving the Physical Uplink Shared CHannel (PUSCH) transmitted by all symbols in the time resource or all symbols in the middle to the end of the time resource .
In any case of all the symbols in the time resource and all the symbols in the middle to the end of the time resource, the data of the PUSCH generated by the same transport block size is received.
Integrated circuit. A receiver that receives an uplink grant that indicates a time resource consisting of multiple symbols for uplink transmission, and
It comprises a transmitter that transmits a Physical Uplink Shared CHannel (PUSCH) transmitted by all symbols in the time resource or all symbols in the middle to the end of the time resource .
The transmitter transmits the data of the PUSCH generated by the same transport block size in any case of all the symbols in the time resource and all the symbols in the middle to the end of the time resource .
Terminal. The PUSCH ends at least at the boundary in the time resource.
The terminal according to claim 11. The time resource is notified before the result of Listen-Before-Talk (LBT) in the terminal is obtained.
The terminal according to claim 11. If the channel is busy, the channel access by Listen-Before-Talk (LBT) on the terminal will fail.
The terminal according to claim 11. If the channel access by Listen-Before-Talk (LBT) in the terminal fails, the LBT is performed again in the time resource.
The terminal according to claim 11. Based on the result of channel access by Listen-Before-Talk (LBT) in the terminal , all symbols in the time resource or all symbols in the middle to the end of the time resource are determined.
The terminal according to claim 11. The time resource is a subframe,
The terminal according to claim 11. The PUSCH is transmitted using Licensed-Assisted Access (LAA).
The terminal according to claim 11. A step to receive an uplink grant indicating a time resource consisting of multiple symbols for uplink transmission, and
A step of transmitting a Physical Uplink Shared CHannel (PUSCH) transmitted by all symbols in the time resource or all symbols in the middle to the end of the time resource .
In any case of all the symbols in the time resource and all the symbols in the middle to the end of the time resource, the data of the PUSCH generated by the same transport block size is transmitted.
Communication method. The process of receiving an uplink grant that indicates a time resource consisting of multiple symbols for uplink transmission, and
It controls the process of transmitting the Physical Uplink Shared CHannel (PUSCH) transmitted by all the symbols in the time resource or all the symbols in the middle to the end of the time resource .
In any case of all the symbols in the time resource and all the symbols in the middle to the end of the time resource, the data of the PUSCH generated by the same transport block size is transmitted.
Integrated circuit.

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