WO2021090463A1 - 端末 - Google Patents
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- WO2021090463A1 WO2021090463A1 PCT/JP2019/043777 JP2019043777W WO2021090463A1 WO 2021090463 A1 WO2021090463 A1 WO 2021090463A1 JP 2019043777 W JP2019043777 W JP 2019043777W WO 2021090463 A1 WO2021090463 A1 WO 2021090463A1
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- hop
- user terminal
- transmission
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- pusch
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/0012—Hopping in multicarrier systems
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
Definitions
- the present invention relates to a terminal in a wireless communication system.
- 5G or NR New Radio
- 5G various radio technologies and network architectures have been studied in order to satisfy the requirement that the delay of the radio section be 1 ms or less while achieving a throughput of 10 Gbps or more (for example, Non-Patent Document 1).
- Non-Patent Document 2 The same random access procedure as LTE is specified in NR (Non-Patent Document 2). Further, in NR, a random access procedure (called a 2-step RACH) executed in two steps is being studied in order to reduce delay and power consumption.
- a 2-step RACH a random access procedure executed in two steps is being studied in order to reduce delay and power consumption.
- the user terminal transmits MsgA using the preamble resource and the PUSCH resource in the first step. Further, it is considered to apply frequency hopping to data transmission (PUSCH transmission) in MsgA.
- the present invention has been made in view of the above points, and an object of the present invention is to provide a technique capable of appropriately performing frequency hopping of PUSCH transmission in a random access procedure.
- a control unit that acquires the gap length between the first hop and the second hop in PUSCH transmission to which frequency hopping is applied in a random access procedure, and a control unit.
- a terminal is provided that includes a transmission unit that performs PUSCH transmission in the first hop, and then performs PUSCH transmission in the second hop after the gap length.
- a technology that enables appropriate frequency hopping of PUSCH transmission in a random access procedure is provided.
- Example 1-2 It is a figure for demonstrating Example 1-2. It is a figure for demonstrating Example 1-2. It is a figure for demonstrating Example 1-3. It is a figure for demonstrating Example 1-4. It is a figure for demonstrating Example 1-5. It is a figure for demonstrating Example 2.
- FIG. It is a figure for demonstrating Example 3.
- FIG. It is a figure for demonstrating Example 4.
- FIG. It is a figure which shows an example of the functional structure of the base station apparatus 10 in embodiment of this invention. It is a figure which shows an example of the functional structure of the user terminal 20 in embodiment of this invention. It is a figure which shows an example of the hardware composition of the base station apparatus 10 or the user terminal 20 in embodiment of this invention.
- Existing technology is appropriately used in the operation of the wireless communication system according to the embodiment of the present invention.
- the existing technology is, for example, existing NR or LTE, but is not limited to existing NR or LTE.
- the channel names and protocol names used in this specification What is represented by a signal name, a function name, or the like may be called by another name.
- the "time domain” and the “frequency domain” may be replaced with the "time domain” and the "frequency domain”, respectively.
- FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.
- the wireless communication system according to the embodiment of the present invention includes the base station device 10 and the user terminal 20 as shown in FIG. Although FIG. 1 shows one base station device 10 and one user terminal 20, this is an example, and there may be a plurality of each.
- the base station device 10 is a communication device that provides one or more cells and performs wireless communication with the user terminal 20.
- the physical resources of the radio signal are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Further, the TTI (Transmission Time Interval) in the time domain may be a slot, or the TTI may be a subframe.
- the base station device 10 transmits a synchronization signal, system information, and the like to the user terminal 20.
- Synchronous signals are, for example, NR-PSS and NR-SSS.
- the system information is transmitted by, for example, NR-PBCH or PDSCH, and is also referred to as broadcast information.
- the base station apparatus 10 transmits a control signal or data to the user terminal 20 by DL (Downlink), and receives the control signal or data from the user terminal 20 by UL (Uplink).
- DL Downlink
- UL Uplink
- a control channel such as PUCCH or PDCCH
- data such as a name is an example. Is.
- the user terminal 20 is a communication device having a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, and a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the user terminal 20 is provided by a wireless communication system by receiving a control signal or data from the base station apparatus 10 in DL and transmitting the control signal or data to the base station apparatus 10 in UL. Use various communication services.
- the user terminal 20 may be referred to as a UE, and the base station apparatus 10 may be referred to as a gNB. Further, the user terminal 20 may be referred to as a "terminal".
- FIG. 2 shows a configuration example of a wireless communication system when DC (Dual connectivity) is executed.
- a base station device 10A serving as an MN (Master Node) and a base station device 10B serving as an SN (Secondary Node) are provided.
- the base station device 10A and the base station device 10B are each connected to the core network.
- the user terminal 20 can communicate with both the base station device 10A and the base station device 10B.
- the cell group provided by the base station device 10A, which is an MN, is called an MCG (Master Cell Group), and the cell group provided by the base station device 10B, which is an SN, is called an SCG (Secondary Cell Group).
- the processing operation in the present embodiment may be executed in the system configuration shown in FIG. 1, may be executed in the system configuration shown in FIG. 2, or may be executed in a system configuration other than these.
- FIG. 3 illustrates CBRA (Content based Random Access, collision-type random access) as an example.
- Examples 1 to 4 described later may be applied to PUSCH transmission in a 4-step random access procedure.
- a random access procedure can be executed by selecting an SS / PBCH block (also called SSB, which may be called a synchronization signal block or a synchronization signal), or CSI-RS (Channel State Information-Reference Signal). ) Can also be selected to perform a random access procedure.
- SSB also called SSB, which may be called a synchronization signal block or a synchronization signal
- CSI-RS Channel State Information-Reference Signal
- the base station device 10 transmits SSB (or CSI-RS) for each beam, for example, and the user terminal 20 monitors the SSB (or CSI-RS) for each beam.
- the user terminal 20 selects an SSB (or CSI-RS) whose received power is larger than a predetermined threshold value from a plurality of SSBs (or CSI-RSs), and a PRACH resource corresponding to the selected SSB (or CSI-RS).
- Msg1 RA threshold
- RACH occlusion may be called PRACH occlusion.
- the user terminal 20 that has received the Msg2 transmits the Message3 (Msg3) including the predetermined information to the base station apparatus 10 (S3).
- the base station device 10 that has received the Msg3 transmits the Message4 (Msg4) to the user terminal 20 (S4).
- Msg4 Message4
- S4 the user terminal 20
- the user terminal 20 recognizes that the Msg4 is the Msg4 addressed to itself corresponding to the above-mentioned Msg3 (Contention resolution: OK).
- the above random access procedure consists of 4 steps, so this is called a 4-step RACH.
- FIG. 4 shows CBRA (Contention based Random Access, collision type random access) as an example, but the two-step RACH can also be applied to CFRA (Contention Free Random Access, non-collision type random access).
- CFRA Contention Free Random Access, non-collision type random access
- the technique in this embodiment may be applied to either CBRA or CFRA.
- the user terminal 20 transmits the Message A (MsgA) having the preamble and the data to the base station apparatus 10.
- MsgA Message A
- the user terminal 20 selects the PRACH resource in the same manner as the selection of the PRACH resource (RACH occupation) in the 4-step RACH, transmits the preamble with the PRACH resource, and the PUSCH resource associated with the PRACH resource ( Data is transmitted by (called PUSCH occupation).
- the preamble and data correspond to, for example, Msg1 and Msg3 in the 4-step RACH.
- the base station device 10 transmits the MessageB (MsgB) to the user terminal 20.
- the content of MsgB corresponds to, for example, Msg2 and Msg4 in 4-step RACH.
- the above random access procedure consists of two steps, so this is called a two-step RACH.
- the 2-step RACH is an example of a random access procedure with a reduced number of steps.
- the preamble and PUSCH in the 2-step RACH are not integrated at least from the viewpoint of the physical layer.
- the preamble resource which is a remote physical resource
- the message transmitted by the PUSCH resource are collectively called MsgA.
- MsgA PUSCH occlusion is one MsgA PUSCH resource and one MsgA RACH occlusion is one MsgA preamble resource.
- one resource means a resource used in one transmission.
- MsgA PUSCH occlusion and MsgA RACH occlusion are referred to as PUSCH occlusion (abbreviated as PO) and RACH occlusion (abbreviated as RO), respectively.
- the RACH occupation is set to the user terminal 20 by the RRC message (RACH configuration).
- RACH configuration RRC message
- the PUSCH occupation for example, a correspondence relationship is defined between the PUSCH occupation and the RACH occupation, and the user terminal 20 determines the PUSCH occupation according to the correspondence relationship.
- the correspondence between PUSCH occlusion and RACH occlusion may be one-to-one, many-to-one, one-to-many, or many-to-many.
- the RACH occlusion and the PUSCH occlusion are arranged as close to each other in the time domain as possible, but the positions are not limited to the close positions.
- the resource designation method of PUSCH occupation it is designated by the relative position from the corresponding RACH occupation.
- the resource of PUSCH occupation may be specified as an absolute position.
- the resource designation information of the PUSCH occupation may be notified from the base station device 10 to the user terminal 20 as the MsgA PUSCH configuration.
- the base station apparatus 10 transmits an RRC message for setting one or more RACH occupations (which may be called RACH resources) to the user terminal 20.
- RRC message the relative position of the PUSCH occupation (which may be called a PUSCH resource) with respect to the RACH occasion may be set, or the absolute position of the PUSCH occupation may be set.
- the RRC message also includes notification information (which may be called system information) such as SIB (System Information Block).
- SIB System Information Block
- the setting information (the above relative position, etc.) related to the PUSCH configuration may be called MsgA PUSCH configuration.
- the relative position of the PUSCH occupation with respect to the RACH occupation may be set from the base station device 10 to the user terminal 20 by MsgA PUSCH occupation, or is specified in the specifications and the like, and the setting from the base station device 10 to the user terminal 20 is set. It may not be done.
- the fact that the relative position is defined in the specifications or the like means that the user terminal 20 holds (presets) the information of the relative position in a storage means such as a memory in advance.
- the user terminal 20 selects, for example, one SSB whose received power is larger than the threshold value from among the plurality of SSBs, and determines the RACH occupation corresponding to the selected SSB.
- the determined RACH occasion is one of one or more RACH occasions set in S101.
- the user terminal 20 transmits a preamble using the RACH occupation specified in S102, and bases data (example: Msg3) using the PUSCH occupation specified by a relative position (time offset, etc.) from the RACH occupation. It is transmitted to the station device 10.
- the user terminal 20 receives MsgB from the base station apparatus 10.
- the user terminal 20 determines the position of the time domain of the PUSCH occupation used for transmitting MsgA based on the position (start position or end position) of the time domain of the RACH occupation corresponding to the PUSCH occupation.
- the user terminal 20 specifies RACH occlusion # 1 as the RACH occlusion corresponding to the selected SSB.
- the user terminal 20 knows the time domain resource of RACH occupation # 1 by the setting made from the base station apparatus 10.
- the start position of RACH occlusion # 1 is the symbol # 0 of slot # 1
- the relative position (start position) of PUSCH occlusion # 1 used together with RACH occlusion # 1 for transmitting MsgA is "RACH occlusion”.
- the user terminal 20 uses the resource starting from the symbol # 0 of slot # 3 together with RACH occlusion # 1 for the transmission of MsgA, PUSCH occlusion # 1. Determined to be a resource of.
- the time length (which may be called a time offset) representing the relative position described above may be a value preset in the user terminal 20 (that is, a value specified in the specifications or the like). It may be a value set for the user terminal 20 from the base station device 10. This setting may be performed by RRC message, MAC CE, or DCI.
- the time length, frequency position, and frequency length (bandwidth) of the PUSCH occupation may be preset values (that is, values specified in specifications or the like) of the user terminal 20, respectively, or the base station device 10 It may be a value set for the user terminal 20 from. Further, regarding the frequency position of the PUSCH occupation, the relative position (frequency offset) from the frequency position of the RACH occupation may be specified as in the time position.
- FIG. 6 An operation example of the user terminal 20 regarding the determination of the PUSCH occupation (PO) will be described with reference to FIG.
- the position of the time domain of the PO corresponding to the RO is designated as the time length from the start position of the RO to the start position of the PO.
- the user terminal 20 selects RO # 2 from RO # 0 to # 2 based on the received power of the SSB, the user terminal 20 has only the time length indicated by C from the start position of RO # 2.
- the resource having the start position later is determined as the resource of PO # 2.
- the slot in which the PO exists is called an MsgA PUSCH slot.
- time lengths representing the relative positions are separately defined or set as A, B, and C.
- a time length representing a relative position common to PO # 0 to # 2 may be specified or set.
- PO # 0 to # 2 corresponding to RO # 0 to # 2 are arranged so as not to overlap in the time direction, but this is an example.
- PO # 0 and PO # 1 may be arranged at the same time position with the same time length and the frequency positions do not overlap. That is, PO # 0 and PO # 1 may be multiplexed by FDM (frequency division multiplexing). In this case, there may be no frequency gap (that is, continuous) between PO # 0 and PO # 1, or there may be a frequency gap between PO # 0 and PO # 1.
- FDM frequency division multiplexing
- Frequency hopping can be applied to PUSCH transmission in MsgA. More specifically, as "Intra-slot frequency hopping per PO for msgA is configurable using a per msgA configuration", Intra-slot frequency hopping can be set for each MsgA PO.
- FIG. 7 shows the arrangement of PUSCH resources (MsgA PO) used when the user terminal 20 performs PUSCH transmission of MsgA to which frequency hopping is applied.
- the frequency positions of the two PUSCH resources formed by dividing the length in the time direction of the PUSCH resource (for example, PO # 0 shown in FIG. 6) before applying the frequency hopping in half are shifted. Has realized frequency hopping.
- one of the two divided PUSCH resources (the one at the earlier time position) is referred to as the first hop (1sthop), and the other is referred to as the second hop (2ndhop).
- the frequency difference (frequency offset) between the first hop and the second hop is set by, for example, the setting information (MsgA PUSCH configuration) transmitted from the base station device 10 to the user terminal 20. Further, the frequency offset may be a predetermined value. The frequency offset may be set or specified for each PO (PO # 0 to PO # 2 in the example of FIG. 6), or may be set or specified in common for a plurality of POs.
- the user terminal 20 performs PUSCH transmission in the first hop, and performs PUSCH transmission in the second hop without a gap. That is, there is no time gap between the first hop and the second hop.
- Uplink transmission (PUSCH, PUCCH, etc. unrelated to 2-step RACH) other than MsgA PUSCH transmission is basically transmitted at an early timing according to the TA (timing advance) value.
- the transmission timing will be different between the PUSCH transmission of MsgA and other uplink transmissions.
- FIG. 8 even if the transmission timing is deviated between the PUSCH transmission of MsgA and other uplink transmissions, interference does not occur if these frequency positions are different, but as shown in FIG. 9, there is an overlap in the frequency positions. In some cases, interference occurs. In particular, when frequency hopping is applied, there is a high possibility that interference between user terminals will occur.
- the interference caused by TA is an example of the interference between user terminals when frequency hopping is applied. Since the frequency range in which the PUSCH resource of MsgA exists is widened by applying frequency hopping, there is a possibility that interference other than the interference caused by TA may occur.
- Example 1 when frequency hopping is applied to the PUSCH transmission of MsgA, a time gap is provided between the first hop and the second hop.
- the "gap" means a time gap.
- FIG. 10 shows the arrangement of MsgA PO resources when the user terminal 20 applies frequency hopping to perform MsgA PUSCH transmission in Example 1-1. As shown in FIG. 10, there is a gap between the first hop and the second hop.
- MsgA PO may be called PO.
- the start position of PO (eg, the corresponding RO) is sent to the user terminal 20 by the setting information transmitted by the RRC message of S101 of FIG. Time offset from), time length, frequency position, frequency offset of frequency hopping, and time offset indicating the gap are set.
- any one or more of the start position of MsgA PO (example: time offset from the corresponding RO), time length, frequency position, frequency offset of frequency hopping, and time offset indicating a gap is a base station device. It may not be set from 10 but may be set in the user terminal 20 in advance as defined in the specifications and the like.
- the user terminal 20 When the user terminal 20 performs PUSCH transmission of MsgA at a certain PO based on the above setting information or the like, as shown in FIG. 10, the user terminal 20 applies frequency hopping to perform PUSCH transmission in the first hop to open a gap. Then, PUSCH transmission is performed in the second hop.
- the first hop and the second hop each have a time length that is half the time length of the normal PO (without frequency hopping).
- the time offset indicating the gap is the time length between the end time position of the first hop and the start time position of the second hop. However, it is not limited to this.
- the time offset indicating the gap may be the time length between the start time position of the first hop and the start time position of the second hop.
- the user terminal 20 acquires (calculates) the length of the gap between the first hop and the second hop used in the actual transmission based on the time offset, and acquires (calculates) the length of the gap between the first hop and the second hop at the time of transmission. Used as an interval with.
- the start time position of the first hop may be set to the start time position of the PO when frequency hopping is not applied, and the second hop may be shifted later by the gap.
- the end time position of the second hop may be the end time position of the PO when frequency hopping is not applied, and the first hop may be shifted forward by a gap. Which of these is applied may be instructed from the base station apparatus 10 to the user terminal 20.
- Example 1-2 Next, Example 1-2 will be described.
- the method of designating the gap is different from that in Example 1-1. Other than that, it is the same as in Example 1-1.
- Example 1-2 the time position of the second hop is set based on the end time position of the MsgA PUSCH slot (example of the reference time position) or the start time position of the subsequent MsgA PO (example of the reference time position). By designating (or specifying), a gap is formed between the first hop and the second hop as a result.
- the time length (number of symbols) between the end time position of the MsgA PUSCH slot and the end time position of the second hop is set or defined.
- An example of the case where it is done is shown.
- the value of X is set so that an appropriate gap can be created based on the start time position of MsgA PO and the time length of MsgA PO.
- the user terminal 20 acquires the length of the gap between the first hop and the second hop used in the actual transmission based on the start time position of MsgA PO, the time length of MsgA PO, the value of X, etc. ( Calculate) and use for transmission.
- the value of X may be 0. That is, the end time position of the MsgA PUSCH slot and the end time position of the second hop may be the same.
- Example 1-1 instead of the “time offset indicating the gap” in Example 1-1, between the start time position of the subsequent MsgA PO (PO # 2 in the example of FIG. 13) and the end time position of the second hop.
- An example is shown when the time length (number of symbols) of is set or specified. In this case, the value of X is determined so that an appropriate gap can be created based on the start time position of MsgA PO # 1 and the time length of MsgA PO # 1.
- the value of X may be 0. That is, the start time position of the subsequent MsgA PO (PO # 2 in the example of FIG. 12) and the end time position of the second hop may be the same.
- the subsequent PO for example, in the case of PO # 0 shown in FIG. 6, the subsequent PO is PO # 1.
- Example 1-3 will be described. For example, by applying frequency hopping to MsgA PO # 1, when the first hop of PO # 1 and the second hop of PO # 1 are arranged, as shown in FIG. 10 and the like, the first hop There will be space behind in time and in front of the second hop. Interference with MsgA PO # 1 may occur when UL transmission unrelated to 2-step RACH is performed in this empty space.
- Example 1-3 as shown in FIG. 13, MsgA PO # 2, which is an MsgA PO different from MsgA PO # 1, is arranged. By performing such an arrangement, it is possible to prevent other UL transmissions from being performed in the resource in which they are arranged.
- the user terminal 20 is provided with MsgA from the base station apparatus 10 so that the first hop and the second hop of PO # 1 shown in FIG. 13 are arranged as the setting information of PO # 1.
- the starting position of PO # 1 eg, time offset from the corresponding RO
- time length e.g., time length
- frequency position e.g., frequency position
- frequency offset of frequency hopping e.g., frequency offset of frequency hopping
- time offset indicating the gap are set. As described above, any one or more of these may be predetermined.
- the start of MsgA PO # 2 is started from the base station device 10 on the user terminal 20 so that the first hop and the second hop of PO # 2 shown in FIG. 13 are arranged.
- a position eg, time offset from the corresponding RO
- time length e.g., time length
- frequency position e.g., frequency offset for frequency hopping
- time offset indicating the gap are set. As described above, any one or more of these may be predetermined.
- the user terminal 20 when transmitting MsgA by PO # 1, the user terminal 20 performs PUSCH transmission of MsgA using the first hop and the second hop of PO # 1 shown in FIG. 13 according to the above setting information and the like.
- a set of two MsgA PO setting information as illustrated in FIG. 13, that is, the PO # 1 setting information and the PO # 2 setting information may be included in one setting information (MsgA PUSCH configuration). , May be separate. That is, in the case of separate cases, the setting information of PO # 1 may be cornfig1, the setting information of PO # 2 may be config2, and the like.
- the two MsgA POs may be the FDM-treated MsgA POs described above.
- the arrangement is as shown in FIG. 13 (FIG. 13 shows.
- FIG. 13 shows.
- PO # 1 and PO # 2 are multiplexed by FDM.
- PO # 0 and PO # 1 are continuous in frequency. It is not arranged in, but is arranged according to the frequency position to be hopping.
- the frequencies of PO # 0 and PO # 1 are continuous. It may be arranged. That is, the hopping frequency offset may be set (or specified) so that the frequencies are continuous.
- the first hop of PO # 2 and the first hop of PO # 1 are continuous in the frequency direction
- the second hop of PO # 1 and the second hop of PO # 2 are continuous. Two hops are continuous in the frequency direction.
- Example 1-4 for example, as shown in PO # 0 and PO # 1 in FIG. 6, it is assumed that the arrangement of PO before application of frequency hopping is continuous in time. Further, in Example 1-4, when applying frequency hopping with a gap, it is assumed that the second hop is shifted later by the gap. In the following, it is assumed that PO # 1 and PO # 2 are continuous in time.
- Example 1-4 when frequency hopping with a gap is applied to the preceding PO # 1, a part of the end of the second hop of PO # 1 overlaps with the start part of PO # 2.
- the start position of the subsequent PO is shifted backward according to the gap length between the first hop and the second hop of the preceding PO.
- Subsequent POs may or may not have frequency hopping applied.
- a gap may be set (or specified) between POs (eg, between PO # 1 and PO # 2), in which case the set gap and the first hop and the first hop of the preceding PO may be set.
- the start position of the subsequent PO may be shifted according to the value including the gap between the two hops.
- the gap between POs does not have to be applied when frequency hopping is applied.
- FIG. 14 shows the arrangement when the start time position of PO # 2 is shifted by the gap between hops when frequency hopping is applied to each of PO # 1 and PO # 2.
- the user terminal 20 receives the start position (eg, time offset from the corresponding RO) and time length for each of PO # 1 and PO # 2 according to the setting information transmitted in the RRC message of S101 of FIG. , Frequency position, frequency offset of frequency hopping, and time offset indicating the gap are set. It should be noted that one or more of these pieces of information may be set in advance instead of being set from the base station apparatus 10. In addition to the above, a gap may be set between PO # 1 and PO # 2.
- the user terminal 20 performs PUSCH transmission of MsgA by PO # 2.
- the user terminal 20 sets PO as the time position of "the set (or specified) start time position of PO # 2 + the gap between hops in PO # 1" as the start time position of the first hop of PO # 2.
- PUSCH transmission is performed in the first hop of # 2, a gap is opened, and PUSCH transmission is performed in the second hop of PO # 2.
- Example 1-5 will be described. Also in Example 1-5, as shown in FIG. 6, for example, it is assumed that the arrangement of PO before application of frequency hopping is continuous in time. Further, also in Example 1-5, when applying frequency hopping with a gap, it is assumed that the second hop is shifted later by the gap.
- the user terminal 20 is set to have the end time position of the preceding PO and the start time position of the succeeding PO continuous. It has been done.
- a gap may be set (or specified) between POs (eg, between PO # 1 and PO # 2), and in that case, the start position of the subsequent PO is shifted by the set gap. Is done.
- FIG. 15 shows an arrangement in which the start time position of PO # 2 is shifted from the end time position of PO # 1 by the gap between POs when frequency hopping is applied to each of PO # 1 and PO # 2. Is shown. If the gap between POs is not set, the first hop of PO # 2 is arranged in chronological order with respect to the second hop of PO # 1.
- the setting information transmitted in the RRC message of S101 of FIG. 5 indicates that "PO # 1 start position (example: time offset from corresponding RO), time length, frequency position, frequency hopping”.
- a time offset indicating the gap ”and“ a time offset indicating the gap between PO # 1 and PO # 2 ” are set.
- any one or more of the above may not be set from the base station device 10 but may be specified in advance.
- the user terminal 20 performs PUSCH transmission of MsgA by PO # 2.
- the user terminal 20 sets the time position obtained by adding the gap between POs to the end time position of PO # 1 (the end time position of the second hop) after the gap between hops is applied by PO # 1.
- PUSCH transmission is performed at the first hop of PO # 2 as the start time position of the first hop of # 2
- PUSCH transmission is performed at the second hop of PO # 2 with a gap.
- Example 2 Next, Example 2 will be described.
- the time length of the first hop and the time length of the second hop are the same.
- Example 2 An example in which the time length of the first hop and the time length of the second hop are different will be described as Example 2.
- the gap between hops may or may not be set.
- FIG. 16 shows an example in which the time length of the first hop is shorter than the time length of the second hop when frequency hopping is applied in a certain PO.
- the user terminal 20 receives the start position (eg, time offset from the corresponding RO), frequency position, frequency hopping frequency offset for a certain PO according to the setting information transmitted in the RRC message of S101 of FIG.
- the time length of the first hop and the time length of the second hop are set. It should be noted that one or more of these may not be set from the base station device 10 but may be predetermined and set in the user terminal 20 in advance. In addition to the above, gaps between hops may be set.
- the time length of the first hop and the time length of the second hop may be set or specified, respectively, or the entire PO may be set or specified.
- the ratio of the time length to the time length of the first hop (or the second hop) to the time length of the entire PO may be set or specified, or other methods may be used.
- the user terminal 20 performs PUSCH transmission of MsgA at the above PO.
- the user terminal 20 performs PUSCH transmission with the set (or specified) PO start time position as the start time position of the first hop of the PO for the time length set in the first hop of the PO, and PO.
- PUSCH is transmitted for the time length set in the second hop of.
- Example 3 Next, Example 3 will be described. Example 3 may be carried out in combination with Examples 1, 2 and 4, or may be carried out independently of Examples 1, 2 and 4. Here, it is assumed that it is carried out in combination with the first embodiment.
- the TA value used for PUSCH transmission of MsgA is notified from the base station apparatus 10 to the user terminal 20.
- This TA value is greater than 0, for example the maximum possible value (eg 3846).
- This TA value may be included in the setting information of the RRC message in S101 of FIG.
- the user terminal 20 applies the TA value received in S201 to determine the transmission timing of the PUSCH transmission of MsgA, and performs the PUSCH transmission of MsgA at the transmission timing.
- the above example is an example in which the TA value is notified from the base station device 10 to the user terminal 20.
- the TA value for PUSCH transmission of MsgA is specified and may be set in advance in the user terminal 20.
- the TA value used when frequency hopping is applied in the PUSCH transmission of MsgA may be set (or specified).
- the user terminal 20 applies the TA value when applying frequency hopping in the PUSCH transmission of MsgA, and performs the PUSCH transmission by the first hop and the second hop.
- the TA value even if the TA value used when frequency hopping is applied in MsgA PUSCH transmission and the TA value used when frequency hopping is not applied in MsgA PUSCH transmission are set (or specified). Good.
- the user terminal 20 advances the first hop and the second hop by a larger amount than the propagation delay.
- the hop will be transmitted, but by adjusting the start time position of the first hop, the actual start time position of the first hop can be made later than the TA value. Therefore, for example, an event as shown in FIG. 9 occurs. It can be avoided appropriately.
- the actual start time position can be shifted later by applying the gap.
- Example 4 Next, Example 4 will be described. Example 4 is carried out in combination with Example 1. However, the combination with Example 1 is an example, and may be further combined with Examples 2 and 3.
- frequency hopping is applied to the PUSCH transmission of MsgA only when the user terminal 20 holds a valid TA value at the time of PUSCH transmission of MsgA.
- the user terminal 20 applies the TA value when transmitting the first hop and the second hop.
- the user terminal 20 receives a start position (eg, time offset from the corresponding RO), a frequency position, and a frequency offset of frequency hopping for a certain PO according to the setting information transmitted in the RRC message of S101 of FIG.
- the time offset indicating the gap, the time length of PO, etc. are set. It should be noted that one or more of these may not be set from the base station device 10 but may be predetermined and set in the user terminal 20 in advance.
- the user terminal 20 performs PUSCH transmission of MsgA at the above PO. At this time, the user terminal 20 determines whether or not a valid TA is held in S301 of FIG.
- the method of determining that a valid TA is held is not limited to a specific method. For example, if the TA timer (Time Alignment timer) has not expired, it may be determined that a valid TA is held. Further, if the value of the received power (RSRP) of the signal from the base station device 10 measured by the user terminal 20 is equal to or more than the threshold value, it may be determined that the valid TA is held. Further, if the amount of change in the received power (RSRP) of the signal from the base station device 10 measured by the user terminal 20 for a certain period is equal to or less than the threshold value, it may be determined that the valid TA is held. ..
- RSRP received power
- Examples 1 to 4 provide a technique capable of appropriately performing frequency hopping of PUSCH transmission in the random access procedure.
- the base station apparatus 10 and the user terminal 20 include a function of carrying out the above-described first to fourth embodiments. However, the base station apparatus 10 and the user terminal 20 may each have only the functions of any one of the first to fourth embodiments.
- FIG. 19 is a diagram showing an example of the functional configuration of the base station apparatus 10.
- the base station apparatus 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140.
- the functional configuration shown in FIG. 19 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
- the transmitting unit 110 and the receiving unit 120 may be referred to as a communication unit.
- the transmission unit 110 includes a function of generating a signal to be transmitted to the user terminal 20 side and transmitting the signal wirelessly.
- the receiving unit 120 includes a function of receiving various signals transmitted from the user terminal 20 and acquiring information of, for example, a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal, DL data, etc. to the user terminal 20.
- the setting unit 130 stores preset setting information and various setting information to be transmitted to the user terminal 20 in the storage device, and reads them out from the storage device as needed.
- the contents of the setting information are, for example, a preamble resource, a PUSCH resource, a RAR window length, etc. used for the random access procedure.
- the setting information (MsgA PUSCH configuration, etc.) described in Examples 1 to 4 is read from the setting unit 130, and is notified to the user terminal 20 by the transmission unit 110.
- the control unit 140 for example, allocates resources, controls the entire base station device 10, and the like.
- the signal transmission function unit of the control unit 140 may be included in the transmission unit 110, and the signal reception function unit of the control unit 140 may be included in the reception unit 120.
- the transmitter 110 and the receiver 120 may be referred to as a transmitter and a receiver, respectively.
- FIG. 20 is a diagram showing an example of the functional configuration of the user terminal 20.
- the user terminal 20 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.
- the functional configuration shown in FIG. 20 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
- the transmitting unit 210 and the receiving unit 220 may be referred to as a communication unit.
- the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
- the receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer.
- the setting unit 230 stores various setting information received from the base station device 10 by the receiving unit 220 in the storage device, and reads it out from the storage device as needed.
- the setting unit 230 also stores preset setting information.
- the contents of the setting information are, for example, the setting information described in Examples 1 to 4, the preamble resource used for the random access procedure, the PUSCH resource, the RAR window length, and the like.
- the control unit 240 performs the control and the like described in the first to fourth embodiments. For example, the control unit 240 acquires the time (gap length) between the first hop and the second hop from the setting information (time offset corresponding to the gap, time offset from the end position of the MsgA PO slot, etc.). , The transmission unit 210 transmits with a gap between the first hop and the second hop by the gap length.
- acquisition may be to acquire the setting information stored in the setting unit 230, or may include performing necessary calculations in addition to acquiring the setting information.
- the function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220. Further, the transmitter 210 and the receiver 220 may be referred to as a transmitter and a receiver, respectively.
- the terminal as the user terminal 20 is configured as at least the terminal described in each of the following items.
- a control unit that acquires the gap length between the first hop and the second hop in PUSCH transmission to which frequency hopping is applied in the random access procedure, and a control unit.
- a terminal including a transmission unit that performs PUSCH transmission in the first hop, and then performs PUSCH transmission in the second hop after the gap length.
- a receiver further comprising a receiver that receives a time offset indicating the gap length from the base station apparatus or receives a relative time position from the reference time position for the second hop from the base station apparatus.
- the transmission unit starts the subsequent transmission of the first hop continuously from the end time position of the second hop of the preceding PUSCH transmission, or starts the transmission of the second hop of the preceding PUSCH transmission from the end time position of the second hop.
- the terminal according to item 1 or 2 wherein the transmission of the first hop that follows is started with a gap.
- the first item to the first item to apply the TA value notified from the base station apparatus or the TA value set in advance to the terminal to perform PUSCH transmission in the first hop and the second hop.
- the terminal according to any one of the four items. (Section 6)
- the control unit determines whether or not the terminal holds a valid TA value, and only when it is determined that the terminal holds a valid TA value, frequency hopping in the random access procedure.
- the terminal according to any one of the items 1 to 5, which determines to perform PUSCH transmission to which the above is applied.
- Each of the first to sixth paragraphs provides a technique capable of appropriately performing frequency hopping of PUSCH transmission in a random access procedure.
- each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
- the functional block may be realized by combining the software with the one device or the plurality of devices.
- Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption.
- broadcasting notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these. I can't.
- a functional block (constituent unit) that functions transmission is called a transmitting unit or a transmitter.
- the method of realizing each of them is not particularly limited.
- the base station device 10, the user terminal 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
- FIG. 21 is a diagram showing an example of the hardware configuration of the base station apparatus 10 and the user terminal 20 according to the embodiment of the present disclosure.
- the above-mentioned base station device 10 and user terminal 20 are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. May be done.
- the word “device” can be read as a circuit, device, unit, etc.
- the hardware configuration of the base station device 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
- the processor 1001 For each function of the base station device 10 and the user terminal 20, the processor 1001 performs calculations by loading predetermined software (programs) on the hardware such as the processor 1001 and the storage device 1002, and the communication device 1004 performs communication. It is realized by controlling or controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
- Processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.
- CPU Central Processing Unit
- control unit 140, control unit 240, and the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these.
- a program program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
- the control unit 140 of the base station device 10 shown in FIG. 19 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- the control unit 240 of the user terminal 20 shown in FIG. 20 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- Processor 1001 may be implemented by one or more chips.
- the program may be transmitted from the network via a telecommunication line.
- the storage device 1002 is a computer-readable recording medium, and is, for example, by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured.
- the storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
- the storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.
- the auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu).
- -It may be composed of at least one of a ray® disc), a smart card, a flash memory (eg, a card, a stick, a key drive), a floppy® disc, a magnetic strip, and the like.
- the auxiliary storage device 1003 may be referred to as an auxiliary storage device.
- the storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.
- the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
- the base station device 10 and the user terminal 20 are a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), or the like. It may be configured to include hardware, and the hardware may realize a part or all of each functional block. For example, processor 1001 may be implemented using at least one of these hardware.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- the boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component.
- the operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
- the processing order may be changed as long as there is no contradiction.
- the base station apparatus 10 and the user terminal 20 have been described using a functional block diagram, but such an apparatus may be realized by hardware, software, or a combination thereof.
- the software operated by the processor of the base station apparatus 10 according to the embodiment of the present invention and the software operated by the processor of the user terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read, respectively. It may be stored in a dedicated memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
- information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof may be used.
- RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
- Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication).
- system FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize suitable systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
- the specific operation performed by the base station apparatus 10 in the present specification may be performed by its upper node.
- various operations performed for communication with the user terminal 20 are other than the base station device 10 and the base station device 10. It is clear that this can be done by at least one of the network nodes (eg, MME or S-GW, etc., but not limited to these).
- the network nodes eg, MME or S-GW, etc., but not limited to these.
- the other network nodes may be a combination of a plurality of other network nodes (for example, MME and S-GW). Good.
- the information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
- the input / output information and the like may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.
- the determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example,). , Comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
- Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.).
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.
- wireless technology infrared, microwave, etc.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- a channel and a symbol may be a signal (signaling).
- the signal may be a message.
- the component carrier CC: Component Carrier
- CC Component Carrier
- system and “network” used in this disclosure are used interchangeably.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
- the radio resource may be one indicated by an index.
- base station Base Station
- radio base station base station
- base station device fixed station
- NodeB NodeB
- eNodeB eNodeB
- GNB gNodeB
- access point “ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”
- Terms such as “cell group,” “carrier,” and “component carrier” can be used interchangeably.
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (for example, three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)).
- Communication services can also be provided by Remote Radio Head).
- the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage. Point to.
- MS Mobile Station
- UE User Equipment
- Mobile stations are subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, terminals, depending on the trader. , Wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
- the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station device in the present disclosure may be read by the user terminal.
- communication between a base station device and a user terminal can be changed to communication between a plurality of user terminals 20 (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the replaced configuration.
- the user terminal 20 may have the functions of the base station apparatus 10 described above.
- words such as "up” and “down” may be read as words corresponding to inter-terminal communication (for example, "side”).
- an uplink channel, a downlink channel, and the like may be read as a side channel.
- the user terminal in the present disclosure may be read as a base station device.
- the base station apparatus may have the functions of the above-mentioned user terminal.
- determining and “determining” used in this disclosure may include a wide variety of actions.
- “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as “judgment” or “decision”.
- judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access.
- Accessing (for example, accessing data in memory) may be regarded as "judgment” or “decision”.
- judgment and “decision” mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming”, “expecting”, “considering” and the like.
- connection means any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two “connected” or “combined” elements.
- the connection or connection between the elements may be physical, logical, or a combination thereof.
- connection may be read as "access”.
- the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be “connected” or “coupled” to each other using electromagnetic energies having wavelengths in the microwave and light (both visible and invisible) regions.
- the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applicable standard.
- RS Reference Signal
- Pilot Pilot
- references to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.
- each of the above devices may be replaced with a "part”, a “circuit”, a “device”, or the like.
- the wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
- the numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel.
- Numerology includes, for example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, and transmitter / receiver.
- SCS subcarrier spacing
- TTI Transmission Time Interval
- At least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
- the slot may be composed of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.). Slots may be in time units based on numerology.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain.
- the mini-slot may also be referred to as a sub-slot.
- a minislot may consist of a smaller number of symbols than the slot.
- PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
- the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
- the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
- one subframe may be called a transmission time interval (TTI), a plurality of consecutive subframes may be called TTI, and one slot or one minislot may be called TTI.
- TTI transmission time interval
- the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the base station schedules each user terminal 20 to allocate radio resources (frequency bandwidth that can be used in each user terminal 20, transmission power, etc.) in TTI units.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
- the time interval for example, the number of symbols
- the transport block, code block, code word, etc. may be shorter than the TTI.
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
- TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
- the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
- the resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers contained in the RB may be determined based on numerology.
- the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
- Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
- One or more RBs include a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.
- PRB Physical resource block
- SCG Sub-Carrier Group
- REG Resource Element Group
- PRB pair an RB pair, and the like. May be called.
- the resource block may be composed of one or a plurality of resource elements (RE: Resource Element).
- RE Resource Element
- 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
- Bandwidth part (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a certain neurology in a carrier.
- the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
- UL BWP UL BWP
- DL BWP DL BWP
- One or more BWPs may be set in one carrier for the UE.
- At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
- “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
- the above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples.
- the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
- the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be changed in various ways.
- the term "A and B are different” may mean “A and B are different from each other”.
- the term may mean that "A and B are different from C”.
- Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
- the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
- the SS block or CSI-RS is an example of a synchronization signal or a reference signal.
- Base station device 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 User terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device
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Abstract
Description
前記第1ホップでPUSCH送信を行った後、前記ギャップ長の後に、前記第2ホップでPUSCH送信を行う送信部と
を備える端末が提供される。
図1は、本発明の実施の形態における無線通信システムを説明するための図である。本発明の実施の形態における無線通信システムは、図1に示されるように、基地局装置10及びユーザ端末20を含む。図1には、基地局装置10及びユーザ端末20が1つずつ示されているが、これは例であり、それぞれ複数であってもよい。
まず、図3を参照して、本実施の形態における無線通信システムにおいて実行され得る4ステップのランダムアクセス手順の例を説明する。なお、図3は、一例としてCBRA(Contention based Random Access、衝突型ランダムアクセス)について説明している。なお、後述する実施例1~4は、4ステップのランダムアクセス手順におけるPUSCH送信に適用してもよい。
PUSCH occasionのリソース指定に関する動作例を図5を参照して説明する。
MsgAにおけるPUSCH送信について、周波数ホッピングを適用することができる。より具体的には、「Intra-slot frequency hopping per PO for msgA is configurable using a per msgA configuration」として、MsgA PO毎に、Intra-slot frequency hoppingを設定可能とする。
実施例1では、MsgAのPUSCH送信に周波数ホッピングを適用する場合に、第1ホップと第2ホップとの間に時間のギャップを設けるようにする。なお、以降、「ギャップ」は時間のギャップを意味する。第1ホップと第2ホップとの間にギャップを設けることで、ギャップを設けない場合に対して、第1ホップ又は第2ホップの時間位置をずらすことができ、他のPUSCH送信等との干渉を防止することを実現できる。以下、より詳細な例として、実施例1-1~実施例1-5を説明する。
図10は、実施例1-1において、ユーザ端末20が、周波数ホッピングを適用してMsgAのPUSCH送信を行う場合におけるMsgA POのリソースの配置を示している。図10に示すように、第1ホップと第2ホップとの間にギャップが存在する。なお、"MsgA PO"をPOと呼んでもよい。
次に、実施例1-2を説明する。実施例1-2は、実施例1-1と比べて、ギャップの指定方法が異なる。それ以外は実施例1-1と同じである。
次に、実施例1-3を説明する。例えば、MsgA PO#1に周波数ホッピングを適用することで、PO#1の第1ホップとPO#1の第2ホップが配置される場合において、図10等に示したように、第1ホップの時間的な後方、及び、第2ホップの時間的な前方に空きができる。この空きに2ステップRACHとは関係のないUL送信が行われる場合にMsgA PO#1との干渉が生じる可能性がある。
次に、実施例1-4を説明する。実施例1-4では、例えば図6のPO#0、PO#1に示したように、周波数ホッピング適用前のPOの配置が時間的に連続する場合を想定している。また、実施例1-4では、ギャップ付きの周波数ホッピングを適用する際に、ギャップ分だけ第2ホップを後にずらす例を想定している。以下では、PO#1とPO#2が時間的に連続である場合を想定する。
次に、実施例1-5を説明する。実施例1-5でも、例えば図6に示したように、周波数ホッピング適用前のPOの配置が時間的に連続する場合を想定している。また、実施例1-5でも、ギャップ付きの周波数ホッピングを適用する際に、ギャップ分だけ第2ホップを後にずらす例を想定している。
次に、実施例2を説明する。これまでに説明した例では、MsgAのPUSCH送信に周波数ホッピングを適用する際に、第1ホップの時間長と第2ホップの時間長は同じである。ただし、これは例であり、これまでに説明した例において、第1ホップの時間長と第2ホップの時間長は異なっていてもよい。
次に、実施例3を説明する。実施例3は、実施例1、2、4と組み合わせて実施されてもよいし、実施例1、2、4とは独立に実施されてもよい。ここでは、実施例1と組み合わせて実施されることを想定している。
次に、実施例4を説明する。実施例4は、実施例1と組み合わせて実施される。ただし、実施例1と組み合わせることは一例であり、更に、実施例2、3と組み合わせられてもよい。
次に、これまでに説明した処理及び動作を実行する基地局装置10及びユーザ端末20の機能構成例を説明する。基地局装置10及びユーザ端末20は上述した実施例1~4を実施する機能を含む。ただし、基地局装置10及びユーザ端末20はそれぞれ、実施例1~4のうちのいずれかの実施例の機能のみを備えることとしてもよい。
図19は、基地局装置10の機能構成の一例を示す図である。図19に示されるように、基地局装置10は、送信部110と、受信部120と、設定部130と、制御部140とを有する。図19に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。送信部110と受信部120とを通信部と呼んでもよい。
図20は、ユーザ端末20の機能構成の一例を示す図である。図20に示されるように、ユーザ端末20は、送信部210と、受信部220と、設定部230と、制御部240とを有する。図20に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。送信部210と受信部220とを通信部と呼んでもよい。
(第1項)
ランダムアクセス手順の中の周波数ホッピングを適用したPUSCH送信における第1ホップと第2ホップとの間のギャップ長を取得する制御部と、
前記第1ホップでPUSCH送信を行った後、前記ギャップ長の後に、前記第2ホップでPUSCH送信を行う送信部と
を備える端末。
(第2項)
前記ギャップ長を示す時間オフセットを基地局装置から受信する、又は、前記第2ホップについての基準時間位置からの相対時間位置を基地局装置から受信する受信部を更に備え、
前記制御部は、前記時間オフセット、又は、前記相対時間位置に基づいて、前記ギャップ長を取得する
第1項に記載の端末。
(第3項)
前記送信部は、先行するPUSCH送信の第2ホップの終了時間位置から連続して、後続である前記第1ホップの送信を開始する、又は、先行するPUSCH送信の第2ホップの終了時間位置から、ギャップを空けて、後続である前記第1ホップの送信を開始する
第1項又は第2項に記載の端末。
(第4項)
前記第1ホップの時間長と前記第2ホップの時間長は同一時間長ではない
第1項ないし第3項のうちいずれか1項に記載の端末。
(第5項)
前記送信部は、基地局装置から通知されたTA値、又は、前記端末に予め設定されたTA値を適用して、前記第1ホップ及び前記第2ホップでPUSCH送信を行う
第1項ないし第4項のうちいずれか1項に記載の端末。
(第6項)
前記制御部は、前記端末が有効なTA値を保持しているか否かを判定し、前記端末が有効なTA値を保持していると判定した場合にのみ、前記ランダムアクセス手順において、周波数ホッピングを適用したPUSCH送信を行うことを決定する
第1項ないし第5項のうちいずれか1項に記載の端末。
上記実施形態の説明に用いたブロック図(図19及び図20)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、基地局装置10及びユーザ端末20は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従って基地局装置10が有するプロセッサにより動作するソフトウェア及び本発明の実施の形態に従ってユーザ端末20が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
110 送信部
120 受信部
130 設定部
140 制御部
20 ユーザ端末
210 送信部
220 受信部
230 設定部
240 制御部
1001 プロセッサ
1002 記憶装置
1003 補助記憶装置
1004 通信装置
1005 入力装置
1006 出力装置
Claims (6)
- ランダムアクセス手順の中の周波数ホッピングを適用したPUSCH送信における第1ホップと第2ホップとの間のギャップ長を取得する制御部と、
前記第1ホップでPUSCH送信を行った後、前記ギャップ長の後に、前記第2ホップでPUSCH送信を行う送信部と
を備える端末。 - 前記ギャップ長を示す時間オフセットを基地局装置から受信する、又は、前記第2ホップについての基準時間位置からの相対時間位置を基地局装置から受信する受信部を更に備え、
前記制御部は、前記時間オフセット、又は、前記相対時間位置に基づいて、前記ギャップ長を取得する
請求項1に記載の端末。 - 前記送信部は、先行するPUSCH送信の第2ホップの終了時間位置から連続して、後続である前記第1ホップの送信を開始する、又は、先行するPUSCH送信の第2ホップの終了時間位置から、ギャップを空けて、後続である前記第1ホップの送信を開始する
請求項1又は2に記載の端末。 - 前記第1ホップの時間長と前記第2ホップの時間長は同一時間長ではない
請求項1ないし3のうちいずれか1項に記載の端末。 - 前記送信部は、基地局装置から通知されたTA値、又は、前記端末に予め設定されたTA値を適用して、前記第1ホップ及び前記第2ホップでPUSCH送信を行う
請求項1ないし4のうちいずれか1項に記載の端末。 - 前記制御部は、前記端末が有効なTA値を保持しているか否かを判定し、前記端末が有効なTA値を保持していると判定した場合にのみ、前記ランダムアクセス手順において、周波数ホッピングを適用したPUSCH送信を行うことを決定する
請求項1ないし5のうちいずれか1項に記載の端末。
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- 2019-11-07 US US17/755,419 patent/US20230328721A1/en active Pending
- 2019-11-07 WO PCT/JP2019/043777 patent/WO2021090463A1/ja active Application Filing
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JPWO2021090463A1 (ja) | 2021-05-14 |
US20230328721A1 (en) | 2023-10-12 |
CN114616909A (zh) | 2022-06-10 |
JP7350877B2 (ja) | 2023-09-26 |
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