WO2019130556A1 - User device and resource selection method - Google Patents

User device and resource selection method Download PDF

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Publication number
WO2019130556A1
WO2019130556A1 PCT/JP2017/047278 JP2017047278W WO2019130556A1 WO 2019130556 A1 WO2019130556 A1 WO 2019130556A1 JP 2017047278 W JP2017047278 W JP 2017047278W WO 2019130556 A1 WO2019130556 A1 WO 2019130556A1
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WIPO (PCT)
Prior art keywords
resource
user apparatus
resources
mode
resource set
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PCT/JP2017/047278
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French (fr)
Japanese (ja)
Inventor
真平 安川
聡 永田
ギョウリン コウ
ホワン ワン
Original Assignee
株式会社Ｎｔｔドコモ
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Priority to PCT/JP2017/047278 priority Critical patent/WO2019130556A1/en
Publication of WO2019130556A1 publication Critical patent/WO2019130556A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0033—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation each allocating device acting autonomously, i.e. without negotiation with other allocating devices
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to a user equipment in a wireless communication system.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution Advanced
  • NR New Radio
  • 5G New Radio
  • D2D reduces traffic between a user apparatus and a base station, and enables communication between user apparatuses even when the base station becomes incapable of communication in a disaster or the like.
  • D2D is D2D discovery (also referred to as D2D discovery, also referred to as D2D discovery) for finding another user apparatus that can communicate, and D2D communication for direct communication between user apparatuses (D2D direct communication, D2D communication, direct communication between terminals) It is divided roughly into () and so on.
  • D2D communication, D2D discovery, and the like are simply referred to as D2D or Sidelink, unless distinction is made in particular.
  • the signal transmitted / received by D2D is called a side link signal or SL (Sidelink) signal.
  • V2X Vehicle to Everything
  • V2XI Vehicle to Infrastructure
  • RSU Road-Side Unit
  • V2N Vehicle to Infrastructure
  • V2P Vehicle to Pedestrian
  • Non-Patent Document 1 specifications regarding some functions of V2X are made (eg, Non-Patent Document 1).
  • modes 3 and 4 are defined for resource allocation for V2X communication to the user apparatus.
  • transmission resources are dynamically allocated by Downlink Control Information (DCI) sent from the base station to the user apparatus.
  • DCI Downlink Control Information
  • SPS Semi Persistent Scheduling
  • mode 4 the user apparatus autonomously selects transmission resources from the resource pool.
  • the above mode 3 and mode 4 are assumed to be used in Rel-15 and later releases.
  • the base station allocates resources for SL transmission to the user apparatus.
  • the base station does not know the resources selected by the user apparatus in mode 4
  • the resources allocated to the user apparatus in mode 3 and the resources selected by the user apparatus in mode 4 overlap, and these users There is a possibility that the SL signals transmitted from the device may collide.
  • said subject is a subject which may generate
  • the present invention has been made in view of the above, and it is an object of the present invention to provide a technology capable of reducing collisions of SL signals in a wireless communication system in which a plurality of user apparatuses perform SL transmission. .
  • a user apparatus that selects a resource from a resource pool and performs side link transmission using the selected resource, A setting information management unit that stores setting information of a predetermined resource set in the resource pool; There is provided a user apparatus comprising: a resource selection unit which selects, as a resource for side link transmission, a resource outside the predetermined resource set in preference to a resource in the predetermined resource set.
  • a technology that enables to reduce collisions of SL signals in a wireless communication system in which a plurality of user apparatuses perform SL transmission.
  • V2X It is a figure for demonstrating D2D. It is a figure for demonstrating D2D. It is a figure for demonstrating MAC PDU used for D2D communication. It is a figure for demonstrating the format of SL-SCH subheader. It is a figure for demonstrating the example of the channel structure used by D2D. It is a figure which shows the structural example of the radio
  • FIG. 7 is a diagram for describing a basic operation example in the first embodiment. It is a figure which shows the example of a protection resource set. It is a figure which shows the example of a setting of a protection resource set. It is a figure which shows the example of a setting of a protection resource set. It is a figure explaining excluding a protection resource set from candidate resources in resource selection.
  • 7 is a flowchart for explaining an operation example of the user apparatus UE in the first embodiment.
  • FIG. 7 is a diagram for explaining an operation example of the second embodiment.
  • FIG. 7 is a diagram for explaining an operation example of the second embodiment.
  • FIG. 18 is a diagram showing an example of DCI in the third embodiment.
  • FIG. 18 is a diagram showing an example of DCI in the third embodiment. It is a figure which shows an example of a function structure of the user apparatus UE which concerns on embodiment. It is a figure which shows an example of a function structure of base station 10 which concerns on embodiment. It is a figure which shows an example of the hardware constitutions of the base station 10 which concerns on embodiment, and the user apparatus UE.
  • the wireless communication system according to the present embodiment is assumed to support at least the existing LTE communication scheme. Therefore, when the wireless communication system operates, the existing technology defined by the existing LTE can be used as appropriate.
  • the existing technology is not limited to LTE.
  • “LTE” used in this specification has a broad meaning including LTE-Advanced and LTE-Advanced and later, unless otherwise specified.
  • the protection resource set in the present embodiment indicates that SL transmission by the user apparatus in mode 3 is protected from SL transmission by the user apparatus in mode 4.
  • the scheme of using the protection resource set is applicable to protect SL transmission between multiple user apparatuses that perform SL transmission regardless of the mode.
  • D2D device-to-device communication
  • D2D is broadly divided into “D2D discovery” and “D2D communication”.
  • D2D discovery as shown in FIG. 2A, a resource pool for a Discovery message is secured for each Discovery period, and the user apparatus transmits a Discovery message (discovery signal) in the resource pool.
  • Discovery message discovery signal
  • Type 1 the user apparatus autonomously selects a transmission resource from the resource pool.
  • Type 2b semi-static resources are allocated by higher layer signaling (for example, RRC signaling).
  • D2D communication As shown in FIG. 2B, resource pools for SCI (Sidelink Control Information) / data transmission are periodically secured.
  • the user apparatus on the transmission side notifies the reception side of a data transmission resource (PSSCH resource pool) or the like by the SCI using a resource selected from the Control resource pool (PSCCH resource pool), and transmits data using the data transmission resource.
  • PSSCH resource pool a data transmission resource
  • PSCCH resource pool a resource selected from the Control resource pool
  • “D2D communication” includes mode 1 and mode 2.
  • mode 1 resources are dynamically allocated by (E) PDCCH sent from the base station to the user apparatus.
  • mode 2 the user apparatus autonomously selects transmission resources from the resource pool. For resource pools, those notified by SIB or those defined in advance are used.
  • Rel-14 in addition to mode 1 and mode 2, there are mode 3 and mode 4.
  • SCI SCI and data simultaneously (in one subframe) in resource blocks adjacent in the frequency direction.
  • the SCI may be referred to as SA (scheduling assignment).
  • PSDCH Physical Sidelink Discovery Channel
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • a MAC (Medium Access Control) PDU (Protocol Data Unit) used for D2D includes at least a MAC header, a MAC control element, a MAC SDU (Service Data Unit), and Padding.
  • the MAC PDU may contain other information.
  • the MAC header is configured of one SL-SCH (Sidelink Shared Channel) subheader and one or more MAC PDU subheaders.
  • the SL-SCH subheader is composed of a MAC PDU format version (V), transmission source information (SRC), transmission destination information (DST), reserved bit (R) and the like.
  • V is assigned to the beginning of the SL-SCH subheader and indicates a MAC PDU format version used by the user apparatus.
  • Information on the transmission source is set in the transmission source information.
  • An identifier related to ProSe UE ID may be set in the transmission source information.
  • Information on the transmission destination is set in the transmission destination information. In the destination information, information on the ProSe Layer-2 Group ID of the destination may be set.
  • FIG. 5 An example of a D2D channel structure is shown in FIG. As shown in FIG. 5, PSCCH resource pools and PSSCH resource pools used for “D2D communication” are allocated. In addition, PSDCH resource pools used for "D2D discovery" are allocated in a cycle longer than the channel cycle of "D2D communication".
  • PSSS Primary Sidelink Synchronization signal
  • SSSS Secondary Sidelink Synchronization signal
  • PSBCH Physical Sidelink Broadcast Channel
  • PSSS / SSSS and PSBCH are transmitted in one subframe.
  • FIG. 6 is a diagram showing an example of configuration of a wireless communication system according to the present embodiment.
  • the radio communication system according to the present embodiment includes a base station 10, a user apparatus UE1, and a user apparatus UE2.
  • the user apparatus UE1 intends to be a transmitting side and the user apparatus UE2 is intended to be a receiving side, but both the user apparatus UE1 and the user apparatus UE2 have both a transmitting function and a receiving function.
  • the user apparatus UE1 and the user apparatus UE2 and the like will be simply described as "user apparatus UE" when not particularly distinguished.
  • FIG. 6 shows the case where both the user apparatus UE1 and the user apparatus UE2 are within the coverage as an example, the operation in the present embodiment is the case where both user apparatuses UE are within the coverage and both user's
  • the present invention is applicable to either the case where the device UE is out of coverage or the case where one user device UE is in coverage and the other user device UE is out of coverage.
  • Each of the user apparatuses UE has a function of cellular communication as the user apparatus UE in LTE or NR, and a D2D function (function of performing apparatus-to-device communication by radio) including signal transmission / reception in the above-mentioned channel .
  • the user apparatus UE has a transmitting side function and a receiving side function that perform the operation described in the present embodiment.
  • the user apparatus UE may be any apparatus having the D2D function, but for example, the user apparatus UE may be a vehicle, a terminal held by a pedestrian, an RSU (UE type RSU having the UE function, etc.), etc. is there.
  • the user apparatus UE may be a vehicle, a terminal held by a pedestrian, an RSU (UE type RSU having the UE function, etc.), etc. is there.
  • the processing content of D2D transmission of the user apparatus UE is fundamentally the same as the processing content of uplink transmission in LTE (non-patent document 2).
  • the user apparatus UE scrambles and modulates a codeword of transmission data to generate complex-valued symbols, maps the complex-valued symbols (transmission signal) to one or two layers, and performs precoding. Then, precoded complex-valued symbols are mapped to resource elements, a transmission signal (eg, complex-valued time-domain SC-FDMA signal) is generated, and transmitted from each antenna port.
  • a transmission signal eg, complex-valued time-domain SC-FDMA signal
  • base station 10 a function of cellular communication as base station 10 in LTE or NR, and a function for enabling communication of user apparatus UE in the present embodiment (resource pool setting for user apparatus UE) , Resource allocation, etc.). Further, the base station 10 may be an RSU (eNB type RSUs having an eNB function).
  • RSU eNB type RSUs having an eNB function
  • the signal waveform used by the user apparatus UE for the side link may be OFDMA, SC-FDMA, or any other signal waveform. May be Further, in the radio communication system according to the present embodiment, as in the existing LTE, a frame consisting of a plurality of subframes (eg, 10 subframes) is formed in the time direction, and a plurality of frequency directions are provided. Consists of sub-carriers of One subframe is an example of one transmission time interval (TTI). Time lengths other than subframes (eg, slots) may be used as transmission time intervals.
  • TTI transmission time interval
  • the user apparatus UE autonomously selects a resource for SL signal transmission (hereinafter referred to as mode 4), and a mode in which a resource for SL signal transmission is assigned from the base station 10 ( Hereinafter, any mode of mode 3) can be taken.
  • the mode is set, for example, from the base station 10 to the user apparatus UE.
  • each user apparatus UE in mode 4 selects a radio resource from a synchronized common time-frequency grid.
  • FIG. 7 shows an example in which one subframe is 1 ms, but this is merely an example.
  • one subchannel has the bandwidth of one or more resource blocks.
  • a certain resource can be identified by, for example, a subframe number and a subchannel number (or resource block number).
  • a certain resource can be identified by the number.
  • the “information on reserved resource” described in the present embodiment is, for example, any one or more of the above-mentioned subframe number, subchannel number (or resource block number), and resource number.
  • the resource used by the user apparatus UE to transmit an SL signal (data or control information or data and control information) is autonomous
  • the operation to be selected will be described.
  • the operations described with reference to FIGS. 8 to 10 are the operations defined in Non-Patent Document 1 and the like.
  • the user apparatus UE performs sensing in the background.
  • the user apparatus UE measures interference patterns by reading control information (including resource reservation information, priority, etc.) and power detection. Then, at the time of transmission packet generation, the user apparatus UE selects up to two resources from among a plurality of resources (candidate resources) with low interference in the resource selection window, based on the result of sensing for the past 1000 ms, for example
  • the SL signal is transmitted using the resource.
  • the two resources correspond to the initial transmission resource and the retransmission resource. Further, in the present embodiment, the transmission is not limited to the maximum of two transmissions as described above, and three or more transmissions may be performed.
  • the candidate resource is a resource in a resource pool which is set from the base station 10 to the user apparatus UE (or preset in the user apparatus UE).
  • Transmission of the SL signal is performed periodically. Also, resource reservation is performed. Specifically, the SL signal in a certain transmission cycle includes information on reserved resources used for transmission in the next transmission cycle together with data schedule information. In addition, in the two-time transmission as shown in FIG. 8, the SL signal (specifically, control information) in each transmission includes the information of the other transmission reservation resource as well as the information of its own reservation resource. .
  • the packet to be transmitted may continue to collide with packets transmitted from other user apparatuses UE.
  • the user apparatus UE can not detect whether or not its transmission packet and the transmission packet of another user apparatus UE collide. Therefore, a reselection counter for reselecting resources is defined. As shown in FIG. 9, the reselection counter is decremented each time transmission is performed from the transmission of the first cycle, and the user apparatus UE reselects resources when the reselection counter becomes zero.
  • resource selection includes, as its meaning, resource reselection as described above as well as resource selection when a transmission packet is newly generated.
  • FIG. 10 shows a basic operation, and in the present embodiment, as will be described later, a process taking into account the protected resource set is executed.
  • step S1 the user apparatus UE excludes the resource not monitored from the candidate resources.
  • the user apparatus UE can not monitor the subframe of the resource used for transmission due to the limitation of the Half duplex, the resource of the entire subframe is excluded from the candidate resources.
  • the user apparatus UE grasps the reserved resource (transmission resource of the other user apparatus) by decoding the control information of the other user apparatus UE received in the sensing, and uses the resources from the candidate resources. exclude. More specifically, the user apparatus UE receives the reference signal reception power (S-RSRP, hereinafter referred to as RSRP) in the resource (specifically, PSSCH) among the reserved resources in the sensing section of 1000 ms. Excludes resources above the threshold. Here, when the remaining candidate resources are 20% or less of the whole, adjustment is performed such that 20% or more candidate resources remain by increasing the threshold by 3 dB.
  • S-RSRP reference signal reception power
  • step S3 the user apparatus UE selects, among the remaining candidate resources, two resources having a small amount of interference based on S-RSSI (also referred to as RSSI). More specifically, from the result of evaluating the received power (S-RSSI) of each subchannel in a cycle of 100 ms, 20% of resources with low levels are left as candidates. Note that the cycle of 100 ms is merely an example.
  • step S4 the user apparatus UE randomly selects a transmission resource from the candidate resources remaining at the time of step S3.
  • the reason for selecting transmission resources at random is that there is a high possibility that the interference states of the neighboring UEs are similar, and if the resource with the least interference is selected, the probability of occurrence of packet collision between neighboring UEs is high. It is.
  • RSRP threshold value used in step S2 a value (or a pre-set value) set for each PPPP (Pros Per Packet Priority), which is the priority of the packet, is used.
  • the priority of the packet is determined according to the logical channel type of the packet, and the priority is included in control information (SCI) indicating the transmission resource (or reserved resource) of the packet. Degree is included.
  • SCI control information
  • the user apparatus UE performing resource selection acquires the priority (priority on the receiving side) from the received control information.
  • the user apparatus UE has the priority (priority by the side of transmission) of the packet of the self which it is going to transmit, when performing resource selection.
  • the threshold value of RSRP used in step S2 is determined for each of the "priority on the receiving side and the priority on the transmitting side".
  • ⁇ 8 64 types of threshold values.
  • PPPP priority
  • ⁇ 8 64 types of threshold values.
  • “thresPSSCH-RSRP-List” is “Indicates a list of 64 thresholds, and the threshold should be selected based on the priority in the decoded SCI and the priority in the SCI to be transmitted (see TS 36.213 [23]) A resource is excluded if it is indicated or reserved by a decoded SCI and PSSCH RSRP in the associated data resource is above a threshold.
  • Value 0 corresponds to minus infinity dBm
  • value 1 corresponds to -128 dBm
  • value 2 corresponds to -126 dBm
  • value n corresponds to (-128 + (n-1) * 2) dBm and so on
  • value 66 corresponds" to infinity dBm. ”.
  • mapping between the priority and the threshold as described above is an example, and the priority on the reception side may be associated with the threshold regardless of the priority on the transmission side, for example.
  • the user apparatus UE selects a resource to be used for SL signal transmission from the resource pool. Further, in mode 3, the base station 10 allocates the resource selected from the resource pool for mode 3 to the user apparatus UE.
  • the resource pool may be set individually for each user apparatus UE, may be set commonly in the cell, or multiple users of a certain group It may be set commonly for the devices UE. In the present embodiment, it is assumed that the resource pool is commonly set in the cell, or commonly set for a plurality of user apparatuses UE in a certain group.
  • the resource pool for mode 3 and the resource pool for mode 4 may be set so as not to overlap in the time / frequency domain, or part or all may overlap.
  • the resource pool for mode 3 and the resource pool of the part where the resource pool for mode 4 overlaps is called a shared resource pool (shared resource pool).
  • mode 4 UE is appropriately used as the user apparatus UE in mode 4
  • mode 3 UE is appropriately used as the user apparatus UE in mode 3.
  • a mode 3 resource pool and a mode 4 resource pool are set, and these resource pools overlap. That is, it is assumed that a shared resource pool is set.
  • mode 3 UE resources in the shared resource pool are allocated from the base station 10 for SL signal transmission. Also, mode 4 UE selects a resource in the shared resource pool for SL signal transmission.
  • mode 4 UE may select the resources used for SL signaling by mode 3 UE for SL signaling. In that case, a collision of SL signals occurs. Also, for mode 3 UE, resources used for SL signal transmission may be allocated by mode 4 UE for SL signal transmission. Also in this case, collisions of SL signals occur.
  • mode 4 UE may select a vacant resource not used for mode 3 UE or any other mode 4 UE by sensing.
  • the base station 10 that allocates resources to mode 3 UE can not usually grasp the resources selected by mode 4 UE, mode 3 UE is susceptible to interference from mode 4 UE.
  • Example 1, Example 2, and Example 3 will be described as an example for solving this problem. Embodiments 1 to 3 may be practiced alone or in any combination.
  • Example 1 In the first embodiment, a protected resource set is set in the shared resource pool. However, it is not essential that the protection resource set is set in the shared resource pool, for example, regardless of whether there is an overlap between the mode 3 resource pool and the mode 4 resource pool (that is, the shared resource pool).
  • the protected resource set may be set for the mode 4 UE together with the mode 4 resource pool, regardless of whether or not
  • Mode 4 UE selects a resource outside the protection resource set in the resource pool for mode 4 in preference to a resource inside the protection resource set. Also, the base station 10, for example, selects a resource in the protection resource set with high priority and assigns it to the mode 3 UE.
  • the base station 10 transmits configuration information to the user apparatus UE (assuming mode 4 UE) by higher layer signaling such as RRC signaling (S101).
  • the setting information includes setting information of a mode 4 resource pool and setting information of a protection resource set.
  • the setting information of the S101 does not include the setting information of the mode 4 resource pool but includes the setting information of the protection resource set. It may be
  • the mode 4 resource pool and / or the protection resource set is set from the base station 10 to the user apparatus UE, this is an example, and the mode 4 resource pool and / or Alternatively, the protection resource set may be preset in the user apparatus UE.
  • the user apparatus UE performs SL communication operation (resource selection operation etc.) in consideration of the set protection resource set. Details of the resource selection operation in consideration of the protection resource set will be described later.
  • FIG. 12 is a diagram illustrating an example of setting of a protection resource set.
  • the Rel-14 (release 14) user equipment UE can not recognize the protection resource set
  • the Rel-15 (release 15) user equipment UE does not recognize the protection resource set. It is assumed that you can recognize However, such an assumption is only an example.
  • the resource pool set in Rel-15 UE in mode 4 and the resource pool set in Rel-15 UE in mode 3 overlap, and become a shared resource pool.
  • the resource pool configured for Rel-14 UE in mode 4 and the resource pool configured for Rel-14 UE in mode 3 are orthogonal (do not overlap).
  • a resource pool in which the resource pool set in Rel-14 UE in mode 4 and the resource pool set in Rel-14 UE in mode 3 are the same as the shared resource pool described above.
  • the upper half area in the frequency direction in the shared resource pool is set as a protection resource set.
  • the protection resource set is configured together with the mode 4 resource pool for the mode 4 UE of Rel-15.
  • the protection resource set may not be set (the base station 10 recognizes) and may be set.
  • the protection resource set is not configured (cannot be configured) for Rel-14 UEs.
  • the resource pool for the Rel-14 UE can be protected by setting the resource portion overlapping the protection resource set as the mode 3 resource pool. Also, by orthogonalizing the resource pool set in Rel-14 UE in mode 4 and the resource pool set in Rel-14 UE in mode 3, Rel-14 UE in mode 4 and Rel-14 UE in mode 3 Interference can be avoided.
  • mode 3 UE can recognize the protected resource set unless otherwise specified.
  • mode 4 UE may not recognize the protection resource set.
  • the protection resource set is set to the user equipment UE by the start subchannel index or start subcarrier index and the length in the frequency domain of the protection resource set. That is, in this case, X subchannels or X subcarriers are set in the user apparatus UE as a protection resource set.
  • An example of a protection resource set in this case is shown in FIG. 13A.
  • a partial frequency region of the resource pool is set as a protection resource set over the entire time length of the resource pool (eg, resource pool for mode 4).
  • the “resource pool” illustrated in FIG. 13A may be a shared resource pool.
  • “resource pool” shown in FIG. 13A is a shared resource pool, for example, the base station 10 is for SL signal transmission in consideration of the protected resource pool in the mode 3 resource pool corresponding to the shared resource pool. Resource allocation to the mode 3 UE.
  • the protection resource set may be configured to specify a time domain in addition to the start subchannel index or start subcarrier index and the length in the frequency domain of the protection resource set.
  • the designation of the time domain is made, for example, using the start subframe index, the time length, and the period.
  • An example of a protection resource set in this case is shown in FIG. 13B.
  • the start subchannel index and the length in the frequency direction designate the frequency domain of the protection resource set
  • the start subframe, the time length and the period designate the time domain of the protection resource set.
  • Option A The user apparatus UE basically performs the sensing based resource selection described with reference to FIGS. 8 to 10. However, Option A applies an offset to the received power in the resources in the protected resource set and performs resource selection using the received power after applying the offset in the measurement of received power (RSRP or RSSI) at the time of sensing. .
  • the offset may be set by the upper layer signaling from the base station 10 to the user apparatus UE, or may be preset in the user apparatus UE.
  • the user apparatus UE offsets (a positive value S1) to the value (M) of RSRP measured in the resource in the protected resource set.
  • the value (M + S1) obtained by adding) is used as RSRP used in resource exclusion determination.
  • the threshold is M + S2 (S2 ⁇ S1), M ⁇ threshold. Therefore, when the offset is not used, the resource is not excluded from the candidate resources.
  • the user apparatus UE offsets (a positive value) to the value (K) of the RSSI measured for the resource in the protected resource set.
  • the value (K + L1) obtained by adding L1) is used as the RSSI used in the resource exclusion determination.
  • the resources in the protected resource set are less likely to remain in candidate resources as resources with low interference. Therefore, applying the offset to the resources in the protection resource set can reduce the possibility that the resources in the protection resource set are selected as transmission resources of the SL signal, and use the resources in the protection resource set. It is possible to protect SL signal transmission by mode 3 UE that can be performed.
  • the offset is applied to the resources in the protected resource set
  • the offset may be applied to the resources outside the protected resource set, or the resources in the protected resource set and those outside the protected resource set Offsets may be applied on both of the resources.
  • Option B the user apparatus UE (mode 4 UE) can use resources in the protection resource set as selection candidates when detecting that a certain condition is satisfied. When not detecting that the condition is satisfied, the user apparatus UE (mode 4 UE) can not use resources in the protection resource set as selection candidates.
  • the following conditions 1 and 2 are examples of conditions.
  • CBR Channel busy ratio
  • CBR is an example of a value indicating the degree of congestion of resources, and an amount other than CBR may be used as a value indicating the degree of congestion of resources.
  • CBR is a value defined, for example, in Non-Patent Document 4 as follows.
  • CBR measured by the user apparatus UE in the resource in the protected resource set is CBR_1
  • CBR_2 the user apparatus UE in the resource outside the protected resource set in the resource pool
  • Condition 1 is that “CBR_2 is larger than a predetermined threshold (Tr_2), and the difference between CBR_2 and CBR_1 (CBR_2—CBR_1) is larger than a predetermined threshold (Tr_d)”. That is, when using condition 1, when the user apparatus UE detects that "CBR_2> (or)) Tr_2 and CBR_2-CBR_1> (or Tr) Tr_d" is satisfied by sensing, the protection resource set Resources can be used as selection candidates. In addition, when using condition 1, the user equipment UE does not detect that “CBR_2> (or)) Tr_2 and CBR_2 ⁇ CBR_1> (or Tr) Tr_d” is detected by sensing, the protection resource set Do not select resources within
  • Condition 2 is that “the difference between CBR_2 and CBR_1 (CBR_2 ⁇ CBR_1) is larger than a predetermined threshold (Tr_d)”. That is, when using condition 2, the user apparatus UE uses a resource in the protection resource set as a selection candidate when sensing that “CBR_2 ⁇ CBR_1> (or)) Tr_d” is satisfied by sensing. Moreover, when using condition 2, the user apparatus UE does not set the resource in the protection resource set as a selection candidate when it does not detect that “CBR_2 ⁇ CBR_1> (or)) Tr_d” is satisfied by sensing.
  • Tr_d a predetermined threshold
  • resources outside the protected resource set in the resource pool are selection candidates.
  • Condition 1 protects Mode 3 UE better.
  • Each of the above thresholds (Tr_2, Tr_d) is set, for example, from the base station 10 to the user apparatus UE by RRC signaling or the like. Further, each of the above-described threshold values (Tr_2, Tr_d) may be preset in the user apparatus UE.
  • the user apparatus UE determined not to satisfy the conditions (eg, condition 1, condition 2) for which resources in the protected resource set may be selected as candidates for selection is protected first from the resources in the resource selection window, for example, in the resource selection operation.
  • the resources in the resource set are excluded, and the resource selection operation of S1 to S4 in FIG. 10 is executed on the resources remaining after the exclusion.
  • An example of this case is shown in FIG. In FIG. 14, in the resource selection window, resources in the protected resource set indicated by x are first excluded, and then the resource selection operation is performed.
  • condition 1, condition 2 the resource selection operation of S1 to S4 in FIG.
  • resources in the protected resource set can be excluded from candidates.
  • the user apparatus UE determines whether or not the resource in the protected resource set is usable as a selection candidate by the operation of option B.
  • the user apparatus UE performs a resource selection operation using the offset of option A in S202.
  • the user apparatus UE excludes the protection resource set from the candidate resources (that is, the resources of the resource pool in the resource selection window) in S203.
  • the user apparatus UE executes, for example, an existing resource selection operation (eg, S1 to S4 in FIG. 10) on the candidate resources from which the protection resource set has been excluded.
  • an existing resource selection operation (eg, S1 to S4 in FIG. 10) may be executed.
  • Example 2 Next, Example 2 will be described.
  • the second embodiment an operation example regarding measures against a collision of transmission SL signals between mode 3 UE and mode 4 UE will be described.
  • the operation of the second embodiment may be performed in combination with the first embodiment or may be performed regardless of the first embodiment.
  • Example 2-1 and Example 2-2 will be described.
  • the embodiment 2-1 and the embodiment 2-2 may be implemented in combination or may be implemented without combination.
  • Example 2-1 In Example 2-1, for example, as shown in FIG. 16, mode 3 UE is transmitted including control information (SA) including reservation information (time / frequency information of resource used for SL transmission, resource cycle, etc.) To do (S301). Since mode 3 UE performs SL transmission using resources allocated from the base station 10, no resource reservation is performed. However, in Example 2-1, for example, mode 3 UE sets the cycle of the reservation resource to 0 in SA. It transmits SA including the said reservation information including reservation information.
  • SA control information
  • reservation information time / frequency information of resource used for SL transmission, resource cycle, etc.
  • Mode 4 UE performs the following operation in addition to the existing resource selection operation (eg, S1 to S4 in FIG. 10). That is, assuming that the SL signal using the resource indicated by the reservation information is transmitted from the mode 3 UE in a predetermined cycle, the mode 4 UE that has received the SA can transmit the resource in the cycle using the SL transmission Exclude from candidate resources in resource selection.
  • the predetermined period is, for example, 20 ms or 100 ms, but is not limited thereto. Also, the predetermined cycle may be set from mode 10 UE from the base station 10 or may be preset.
  • the mode 4 UE may perform the existing resource selection operation (eg, S1 to S4 in FIG. 10) without performing the operation based on the transmission SA of the mode 3 UE as described above. Even in the existing resource selection operation, for example, when the mode 3 UE performs periodic transmission, it is possible to exclude the resource of the transmission.
  • the existing resource selection operation eg, S1 to S4 in FIG. 10
  • the resource selection operation using the SA transmitted by the mode 3 UE described above is option 1 and the existing resource selection operation not using the SA transmitted by the mode 3 UE is option 2.
  • Example 2-1 the mode 4 UE performs, for example, the operation of Option 1 on resources in the protected resource set in the resource selection window, and the option 2 on the resources outside the protected resource set in the resource selection window.
  • An action may be performed. That is, mode 4 UE may perform different resource selection operations for resources within the protected resource set and resources outside the protected resource set.
  • Example 2-2 In Example 2-2, as shown in FIG. 17, the user apparatus UE1 (mode 4 UE or mode 3 UE) measures the congestion degree of resources in the resource pool (eg, resource pool for mode 4) by sensing. The value of the congestion degree is transmitted to the base station 10 as channel state information (which may be called a sensing report) (S401). The base station 10 allocates, for example, a resource selected from a resource set obtained by removing a resource with a high degree of congestion from the resource pool, to the user apparatus UE2 (mode 3 UE) based on the channel state information (S402).
  • channel state information which may be called a sensing report
  • one user apparatus is shown as “user apparatus UE1” for transmitting channel state information and “user apparatus UE2” for receiving resource allocation, but this is for convenience of illustration.
  • a plurality of user apparatuses UE may exist as the user apparatus UE1
  • a plurality of user apparatuses UE may exist as the user apparatus UE2.
  • Example 2-2 when detecting that a certain condition is satisfied, the user apparatus UE1 transmits channel state information, and when not detecting that the condition is satisfied, the user apparatus UE1 does not transmit channel state information. It may be Cases 1 and 2 will be described below as an example of the case where such a determination is made.
  • CBR_1 CBR measured by the user apparatus UE1 in a resource in a protected resource set in a resource pool (here, a resource pool for mode 4 is assumed)
  • CBR_2 CBR measured by the user apparatus UE1 in a resource outside the protected resource set in the resource pool.
  • the CBR that is measured is CBR_2.
  • Case 1 the user apparatus UE1 detects that the resources in the protected resource set are congested, and / or detects that the resources outside the protected resource set are congested, and further, detects that the resources in the protected resource set are congested.
  • the congestion degree is higher than the congestion degree of resources outside the protection resource set
  • the channel state information is transmitted to the base station 10. In this case, for example, resources outside the protection resource set are allocated from the base station 10 to the user apparatus UE2.
  • Tr_1, Tr_2, Tr_3 and Tr_d are threshold values
  • the user apparatus UE1 detects “CBR_1> (or)) Tr_1 and / or CBR_2> (or)) Tr_2, and CBR_1-CBR_2> by sensing.
  • Channel state information is reported to the base station 10 when it is detected that “Tr_3 (or Tr_d)” is satisfied.
  • the channel state information includes, for example, information on the degree of congestion for resources outside the protected resource set and information on the degree of congestion for resources in the protected resource set.
  • Case 2 the user apparatus UE1 detects congestion of resources in the protection resource set and / or detects congestion of resources outside the protection resource set, and further, detects the congestion of resources outside the protection resource set.
  • the congestion degree is higher than the congestion degree of the resources in the protection resource set
  • the channel state information is transmitted to the base station 10.
  • resources in the protection resource set are allocated from the base station 10 to the user apparatus UE2.
  • Tr_1, Tr_2, Tr_4, and Tr_d are threshold values
  • the user apparatus UE1 detects “CBR_1> (or ⁇ ) Tr_1, and / or CBR_2> (or)) Tr_2, and CBR_2-CBR_1> by sensing.
  • the channel state information is reported to the base station 10 when it is detected that “Tr_4 (or Tr_d)” is satisfied.
  • the channel state information includes, for example, information on the degree of congestion for resources outside the protected resource set and information on the degree of congestion for resources in the protected resource set.
  • the user apparatus UE1 when it is not detected that the condition is satisfied, the user apparatus UE1 does not transmit the channel state information to the base station 10.
  • the base station 10 transmits the channel state to the user apparatus UE1. It may indicate whether to transmit information to the base station 10 or not. This indication can be performed, for example, using 1 bit in DCI (DCI format 0/4) of UL grant.
  • Example 3 Next, Example 3 will be described.
  • the contents of resource allocation for mode 3 UE notified from the base station 10 are also notified to user apparatuses UE other than the mode 3 UE.
  • mode 4 UE can grasp the resource for SL transmission allocated to mode 3 UE, and can exclude the resource used by mode 3 UE from candidate resources in resource selection.
  • Option 1 and Option 2 will be described.
  • DCI for SL resource allocation in mode 3 transmitted from the base station 10 has resource allocation information (resource allocation), UE ID, and CRC.
  • the UE ID is an ID for identifying a mode 3 UE to be a target of resource allocation.
  • Mode 3 UE recognizes that the DCI is a DCI of resource allocation to itself by detecting its own UE ID from the DCI.
  • the UE ID is not limited to a specific ID, but is, for example, an RNTI, an ID included in SL-BSR (Sidelink Buffer Status Report), or an ID set by higher layer signaling.
  • the CRC is a CRC for the payload and the UE-ID (or payload).
  • the CRC is masked with an RNTI that enables detection in a common search space (which may be a common search space in a cell or a common search space in a certain group of UEs).
  • the RNTI used for the mask may be set from the base station 10 to the user apparatus UE by higher layer signaling, for example, or may be set from the base station 10 to the user apparatus UE by system information (SIB).
  • SIB system information
  • the base station 10 maps the DCI shown in FIG. 18A to the common search space in the downlink control channel and transmits it.
  • the user apparatus UE that receives the DCI performs DCI decoding using the RNTI in the common search space.
  • the user apparatus UE transmits an SL signal using the resource indicated in this DCI. Also, if the UE apparatus that has decoded the DCI is not the UE ID contained in the DCI is its own UE ID, the user apparatus UE recognizes that the resource indicated by the DCI is used for SL signal transmission by another user apparatus UE. For example, in resource selection of its own SL, an operation of excluding the resource from candidate resources can be performed.
  • the base station 10 transmits DCI (referred to as DCI_B) shown in FIG. 18B to the mode 3 UE in addition to DCI (referred to as DCI_A) for SL resource allocation of the mode 3 UE.
  • DCI_B DCI
  • DCI_A DCI for SL resource allocation of the mode 3 UE.
  • the DCI_A has, for example, a CRC masked by the UE-specific RNTI and is transmitted in the UE-specific search space.
  • the DCI_A may be transmitted in the common search space.
  • the DCI_B illustrated in FIG. 18B includes resource allocation information (resource allocation) indicating a resource allocated to the mode 3 UE by the DCI_A, and a CRC.
  • CRC is the CRC for the payload.
  • the CRC is masked with an RNTI that enables detection in a common search space (which may be a common search space in a cell or a common search space in a certain group of UEs).
  • the RNTI used for the mask may be set from the base station 10 to the user apparatus UE by higher layer signaling, for example, or may be set from the base station 10 to the user apparatus UE by system information (SIB).
  • SIB system information
  • the base station 10 maps DCI_A to the UE-specific search space and transmits it, and maps DCI_B to the common search space and transmits it.
  • the user apparatus UE that has successfully decoded DCI_A in the UE-specific search space transmits an SL signal using the resource specified by DCI_A. Also, in the common search space, the user apparatus UE that has decoded DCI_B recognizes that the resource indicated by DCI_B is used for SL transmission by another user apparatus UE, for example, in resource selection of its own SL An action can be taken to exclude resources from candidate resources.
  • the user apparatus UE and the base station 10 have all the functions described in the present embodiment. However, the user apparatus UE and the base station 10 may be provided with only a part of all the functions described in the present embodiment.
  • FIG. 19 is a diagram illustrating an example of a functional configuration of the user apparatus UE.
  • the user apparatus UE has a signal transmission unit 101, a signal reception unit 102, a setting information management unit 103, a resource selection unit 104, and a channel state report unit 105.
  • the functional configuration shown in FIG. 19 is merely an example. As long as the operation according to the present embodiment can be performed, the function classification and the name of the functional unit may be arbitrary.
  • the signal transmission unit 101 may be referred to as a transmitter, and the signal reception unit 102 may be referred to as a receiver.
  • the signal transmission unit 101 creates a transmission from transmission data, and wirelessly transmits the transmission signal.
  • the signal reception unit 102 wirelessly receives various signals, and acquires higher layer signals from the received physical layer signals. Further, the signal receiving unit 102 includes a function of measuring the received power.
  • the setting information management unit 103 stores various setting information received from the base station 10 by the signal receiving unit 102 and setting information set in advance. Examples of setting information include information on resource pools, information on protected resource sets, and the like.
  • the resource selection unit 104 executes the process related to resource selection described in the present embodiment. Note that the resource selection unit 104 may have a sensing function including received power measurement. Also, the channel state reporting unit 105 executes the channel state reporting process (including the process of determining whether to report) described in the second embodiment.
  • the setting information management unit 103 is configured to store setting information of a predetermined resource set in the resource pool, and the resource selection unit 104 is configured to be outside the predetermined resource set as a resource for side link transmission. It is configured to select resources in preference to resources in the predetermined resource set.
  • the resource selection unit 104 performs resource selection, for example, by applying an offset to the measurement result of received power for resources in the predetermined resource set. Further, the resource selection unit 104 is configured to transmit resources in the predetermined resource set as resources for side link transmission based on the congestion degree in the predetermined resource set and the congestion degree outside the predetermined resource set. It may be determined whether to use as a candidate for
  • the resource selection unit 104 does not use a resource in the predetermined resource set as a resource candidate for side link transmission, for example, within the predetermined resource set from the resource pool in the resource selection window.
  • the resource excluding the resource of is used as a candidate of a resource for side link transmission.
  • the resource selection unit 104 may exclude resources allocated to other user apparatuses from candidates for side link transmission based on control information received from a base station.
  • FIG. 20 is a diagram showing an example of a functional configuration of the base station 10.
  • the base station 10 includes a signal transmission unit 201, a signal reception unit 202, a setting information management unit 203, and a resource assignment unit 204.
  • the functional configuration shown in FIG. 20 is merely an example. As long as the operation according to the present embodiment can be performed, the function classification and the name of the functional unit may be arbitrary.
  • the signal transmission unit 201 includes a function of generating a signal to be transmitted to the user apparatus UE side and wirelessly transmitting the signal.
  • the signal receiving unit 202 includes a function of receiving various signals transmitted from the user apparatus UE and acquiring, for example, higher layer information from the received signals. Further, the signal transmission unit 201 includes the function of transmitting the DCI described in the third embodiment.
  • the setting information management unit 203 stores various setting information to be transmitted to the user apparatus UE, various setting information received from the user apparatus UE, and setting information set in advance. Examples of setting information include information on resource pools, information on protected resource sets, and the like.
  • the resource assignment unit 204 performs, for example, processing for assigning resources to mode 3 UEs.
  • each functional block may be realized by one device physically and / or logically connected to a plurality of elements, or directly and two or more physically and / or logically separated devices. And / or indirectly (for example, wired and / or wirelessly) connected, and may be realized by the plurality of devices.
  • both the user apparatus UE and the base station 10 in an embodiment of the present invention may function as a computer that performs the process according to the present embodiment.
  • FIG. 21 is a diagram showing an example of the hardware configuration of the user apparatus UE and the base station 10 according to the present embodiment. Even if the above-mentioned user apparatus UE and base station 10 are physically configured as a computer apparatus including processor 1001, memory 1002, storage 1003, communication apparatus 1004, input apparatus 1005, output apparatus 1006, bus 1007, etc. Good.
  • the term “device” can be read as a circuit, a device, a unit, or the like.
  • the hardware configurations of the user apparatus UE and the base station 10 may be configured to include one or more devices indicated by 1001 to 1006 shown in the figure, or may be configured without including some devices. May be
  • Each function in the user apparatus UE and the base station 10 causes the processor 1001 to perform an operation by reading predetermined software (program) on hardware such as the processor 1001, the memory 1002, and the like, and communication by the communication apparatus 1004; And by controlling the reading and / or writing of data in the storage 1003.
  • predetermined software program
  • the processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU Central Processing Unit
  • the processor 1001 reads a program (program code), a software module or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these.
  • a program a program that causes a computer to execute at least a part of the operations described in the above embodiments is used.
  • the signal transmission unit 101, the signal reception unit 102, the setting information management unit 103, the resource selection unit 104, and the channel state report unit 105 of the user apparatus UE illustrated in FIG. 19 are stored in the memory 1002 and operate in the processor 1001. It may be realized by a control program.
  • control program stored in the memory 1002 of the signal transmission unit 201, the signal reception unit 202, the setting information management unit 203, and the resource assignment unit 204 of the base station 10 shown in FIG. It may be realized by The various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the memory 1002 is a computer readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be done.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device) or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to execute the process according to the embodiment of the present invention.
  • the storage 1003 is a computer readable recording medium, and for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray A (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like may be used.
  • the storage 1003 may be called an auxiliary storage device.
  • the above-mentioned storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server or any other suitable medium.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the signal transmission unit 101 and the signal reception unit 102 of the user device 10 may be realized by the communication device 1004.
  • the signal transmission unit 201 and the signal reception unit 202 of the base station 10 may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) 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 performs output to the outside.
  • the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured by a single bus or may be configured by different buses among the devices.
  • each of the user apparatus UE and the base station 10 includes a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured to include hardware, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • a user apparatus that selects a resource from a resource pool and performs side link transmission using the selected resource, is a user apparatus of a predetermined resource set in the resource pool.
  • a configuration information management unit storing configuration information, and a resource selection unit configured to select a resource outside the predetermined resource set as a resource for side link transmission in preference to a resource in the predetermined resource set.
  • the above configuration provides a technology that makes it possible to reduce the collision of SL signals in a wireless communication system in which a plurality of user apparatuses perform SL transmission.
  • the resource selection unit performs resource selection, for example, by applying an offset to a measurement result of received power for resources in the predetermined resource set. This configuration can reduce the possibility of selecting a resource in the predetermined resource set.
  • the resource selection unit sets a resource in the predetermined resource set as a candidate for side link transmission based on the congestion degree in the predetermined resource set and the congestion degree outside the predetermined resource set. It may be determined whether to use or not. With this configuration, it is possible to determine availability of resources in a predetermined resource set according to the degree of congestion.
  • the resource selection unit excludes the resource in the predetermined resource set from the resource pool in the resource selection window when the resource in the predetermined resource set is not used as a resource candidate for side link transmission.
  • Resources may be used as candidate resources for side link transmission. With this configuration, resource selection processing can be performed on candidate resources from which resources not to be used have been removed.
  • the resource selection unit may exclude resources allocated to other user apparatuses from candidates for sidelink transmission based on control information received from a base station. With this configuration, resources allocated to other user apparatuses can be appropriately excluded from the candidate resources for side link transmission.
  • the operations of multiple functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by multiple components.
  • the order of processing may be changed as long as there is no contradiction.
  • the user apparatus UE and the base station 10 have been described using functional block diagrams for the convenience of the processing description, such an apparatus may be realized in hardware, software or a combination thereof.
  • the software operated by the processor of the user apparatus UE according to the embodiment of the present invention and the software operated by the processor of the base station 10 according to the embodiment of the present invention are random access memory (RAM), flash memory, read only It may be stored in memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • notification of information is not limited to the aspect / embodiment described herein, and may be performed by other methods.
  • notification of information may be physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block), other signals, or a combination thereof.
  • RRC signaling may be called an RRC message, for example, RRC Connection setup (RRC Con ection Setup) message, RRC connection reconfiguration (it may be a RRC Connection Reconfiguration) message.
  • Each aspect / embodiment described in the present specification is LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-Wide Band),
  • the present invention may be applied to a system utilizing Bluetooth (registered trademark), other appropriate systems, and / or an advanced next-generation system based on these.
  • the specific operation supposed to be performed by the base station 10 in this specification may be performed by the upper node in some cases.
  • the various operations performed for communication with the user equipment UE may be performed by the base station 10 and / or other than the base station 10. It is clear that it may be done by a network node (for example but not limited to MME or S-GW etc).
  • a network node for example but not limited to MME or S-GW etc.
  • MME Mobility Management Entity
  • the user equipment UE may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote communication device, a mobile subscriber station, an access terminal, a mobile terminal, by a person skilled in the art. It may also be called a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.
  • Base station 10 may also be referred to by those skilled in the art with NB (Node B), eNB (enhanced Node B), Base Station, gNB, or some other suitable terminology.
  • NB Node B
  • eNB enhanced Node B
  • Base Station gNB
  • determining may encompass a wide variety of operations.
  • “Judgment”, “decision” are, for example, judging, calculating, calculating, processing, processing, deriving, investigating, looking up (for example, a table) (Searching in a database or another data structure), ascertaining may be regarded as “decision”, “decision”, etc.
  • “determination” and “determination” are receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (Accessing) (for example, accessing data in a memory) may be regarded as “judged” or “decided”.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”

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Abstract

A user device for selecting a resource from a resource pool and performing a sidelink transmission using the selected resource, comprising: a configuration information management unit for storing configuration information for a prescribed resource set in the resource pool; and a resource selection unit for preferentially selecting, over a resource in the prescribed resource set, a resource not in the prescribed resource set as a resource for the sidelink transmission.

Description

ユーザ装置、及びリソース選択方法User apparatus and resource selection method
　本発明は、無線通信システムにおけるユーザ装置に関連するものである。 The present invention relates to a user equipment in a wireless communication system.
　ＬＴＥ（Ｌｏｎｇ　Ｔｅｒｍ　Ｅｖｏｌｕｔｉｏｎ）及びＬＴＥの後継システム（例えば、ＬＴＥ－Ａ（ＬＴＥ　Ａｄｖａｎｃｅｄ）、ＮＲ（Ｎｅｗ　Ｒａｄｉｏ）（５Ｇとも呼ぶ））では、ユーザ装置同士が基地局を介さないで直接通信を行うＤ２Ｄ（Ｄｅｖｉｃｅ　ｔｏ　Ｄｅｖｉｃｅ、装置対装置通信）技術が検討されている。 In LTE (Long Term Evolution) and LTE successor systems (for example, LTE-A (LTE Advanced), NR (New Radio) (also referred to as 5G)), D2D in which user apparatuses directly communicate with each other without going through a base station (Device to Device) technology is being considered.
　Ｄ２Ｄは、ユーザ装置と基地局との間のトラフィックを軽減したり、災害時などに基地局が通信不能になった場合でもユーザ装置間の通信を可能とする。 D2D reduces traffic between a user apparatus and a base station, and enables communication between user apparatuses even when the base station becomes incapable of communication in a disaster or the like.
　Ｄ２Ｄは、通信可能な他のユーザ装置を見つけ出すためのＤ２Ｄディスカバリ（Ｄ２Ｄ　ｄｉｓｃｏｖｅｒｙ、Ｄ２Ｄ発見ともいう）と、ユーザ装置間で直接通信するためのＤ２Ｄコミュニケーション（Ｄ２Ｄ　ｄｉｒｅｃｔ　ｃｏｍｍｕｎｉｃａｔｉｏｎ、Ｄ２Ｄ通信、端末間直接通信などともいう）と、に大別される。以下では、Ｄ２Ｄコミュニケーション、Ｄ２Ｄディスカバリなどを特に区別しないときは、単にＤ２Ｄあるいはサイドリンク（Ｓｉｄｅｌｉｎｋ）と呼ぶ。以下、また、Ｄ２Ｄで送受信される信号を、サイドリンク信号あるいはＳＬ（Ｓｉｄｅｌｉｎｋ）信号と呼ぶ。 D2D is D2D discovery (also referred to as D2D discovery, also referred to as D2D discovery) for finding another user apparatus that can communicate, and D2D communication for direct communication between user apparatuses (D2D direct communication, D2D communication, direct communication between terminals) It is divided roughly into () and so on. In the following, D2D communication, D2D discovery, and the like are simply referred to as D2D or Sidelink, unless distinction is made in particular. Hereinafter, the signal transmitted / received by D2D is called a side link signal or SL (Sidelink) signal.
　また、３ＧＰＰでは、上記のＤ２Ｄ機能を拡張することでＶ２Ｘ（Ｖｅｈｉｃｌｅ　ｔｏ　Ｅｖｅｒｙｔｈｉｎｇ）を実現することが検討され、仕様化が進められている。ここで、Ｖ２Ｘとは、ＩＴＳ（Ｉｎｔｅｌｌｉｇｅｎｔ　Ｔｒａｎｓｐｏｒｔ　Ｓｙｓｔｅｍｓ）の一部であり、図１に示すように、自動車間で行われる通信形態を意味するＶ２Ｖ（Ｖｅｈｉｃｌｅ　ｔｏ　Ｖｅｈｉｃｌｅ）、自動車と道路脇に設置される路側機（ＲＳＵ：Ｒｏａｄ－Ｓｉｄｅ　Ｕｎｉｔ）との間で行われる通信形態を意味するＶ２Ｉ（Ｖｅｈｉｃｌｅ　ｔｏ　Ｉｎｆｒａｓｔｒｕｃｔｕｒｅ）、自動車とドライバーのモバイル端末との間で行われる通信形態を意味するＶ２Ｎ（Ｖｅｈｉｃｌｅ　ｔｏ　Ｎｏｍａｄｉｃ　ｄｅｖｉｃｅ）、及び、自動車と歩行者のモバイル端末との間で行われる通信形態を意味するＶ２Ｐ（Ｖｅｈｉｃｌｅ　ｔｏ　Ｐｅｄｅｓｔｒｉａｎ）の総称である。 Further, in 3GPP, it is studied to realize V2X (Vehicle to Everything) by extending the above-mentioned D2D function, and specification is advanced. Here, V2X is a part of ITS (Intelligent Transport Systems), and as shown in FIG. 1, V2V (Vehicle to Vehicle), which means a form of communication performed between vehicles, is installed at the side of vehicles and roads. V2I (Vehicle to Infrastructure), which means the form of communication performed with the Road-Side Unit (RSU), V2N (Vehicle to Infrastructure, means the form of communication performed between the car and the mobile terminal of the driver. It is a generic name of V2P (Vehicle to Pedestrian) which means a form of communication performed between a Nomadic device and a mobile terminal between a car and a pedestrian.
　Ｒｅｌ－１４において、Ｖ２Ｘの幾つかの機能に関する仕様化がなされている(例えば非特許文献１)。当該仕様では、ユーザ装置へのＶ２Ｘ通信用のリソース割り当てに関してモード３とモード４が規定されている。モード３では、基地局からユーザ装置に送られるＤＣＩ（Ｄｏｗｎｌｉｎｋ　Ｃｏｎｔｒｏｌ　Ｉｎｆｏｒｍａｔｉｏｎ）によりダイナミックに送信リソースが割り当てられる。また、モード３ではＳＰＳ（Ｓｅｍｉ　Ｐｅｒｓｉｓｔｅｎｔ　Ｓｃｈｅｄｕｌｉｎｇ）も可能である。モード４では、ユーザ装置はリソースプールから自律的に送信リソースを選択する。なお、Ｒｅｌ－１５及びそれ以降のリリースにおいても、上記モード３、モード４が使用されることが想定される。 In Rel-14, specifications regarding some functions of V2X are made (eg, Non-Patent Document 1). In the specifications, modes 3 and 4 are defined for resource allocation for V2X communication to the user apparatus. In mode 3, transmission resources are dynamically allocated by Downlink Control Information (DCI) sent from the base station to the user apparatus. In mode 3, SPS (Semi Persistent Scheduling) is also possible. In mode 4, the user apparatus autonomously selects transmission resources from the resource pool. The above mode 3 and mode 4 are assumed to be used in Rel-15 and later releases.
　上述したように、モード３では、ユーザ装置に対して基地局からＳＬ送信のためのリソースが割り当てられる。しかし、基地局は、モード４においてユーザ装置により選択されるリソースを把握しないので、モード３のユーザ装置に割り当てられるリソースと、モード４のユーザ装置により選択されるリソースとが重複し、これらのユーザ装置から送信されたＳＬ信号が衝突する可能性がある。 As described above, in mode 3, the base station allocates resources for SL transmission to the user apparatus. However, since the base station does not know the resources selected by the user apparatus in mode 4, the resources allocated to the user apparatus in mode 3 and the resources selected by the user apparatus in mode 4 overlap, and these users There is a possibility that the SL signals transmitted from the device may collide.
　なお、上記の課題は、モード３のユーザ装置とモード４のユーザ装置との間に限らない複数のユーザ装置間で発生し得る課題である。 In addition, said subject is a subject which may generate | occur | produce between several user apparatuses not only between the user apparatus of mode 3 and the user apparatus of mode 4. FIG.
　本発明は上記の点に鑑みてなされたものであり、複数のユーザ装置がＳＬ送信を行う無線通信システムにおいて、ＳＬ信号の衝突を低減することを可能とする技術を提供することを目的とする。 The present invention has been made in view of the above, and it is an object of the present invention to provide a technology capable of reducing collisions of SL signals in a wireless communication system in which a plurality of user apparatuses perform SL transmission. .
　開示の技術によれば、リソースプールからリソースを選択し、選択したリソースを使用してサイドリンク送信を行うユーザ装置であって、
　前記リソースプールにおける所定のリソースセットの設定情報を格納する設定情報管理部と、
　サイドリンク送信用のリソースとして、前記所定のリソースセット外のリソースを、前記所定のリソースセット内のリソースよりも優先して選択するリソース選択部と
　を備えるユーザ装置が提供される。 According to the disclosed technology, there is provided a user apparatus that selects a resource from a resource pool and performs side link transmission using the selected resource,
A setting information management unit that stores setting information of a predetermined resource set in the resource pool;
There is provided a user apparatus comprising: a resource selection unit which selects, as a resource for side link transmission, a resource outside the predetermined resource set in preference to a resource in the predetermined resource set.
　開示の技術によれば、複数のユーザ装置がＳＬ送信を行う無線通信システムにおいて、ＳＬ信号の衝突を低減することを可能とする技術が提供される。 According to the disclosed technology, provided is a technology that enables to reduce collisions of SL signals in a wireless communication system in which a plurality of user apparatuses perform SL transmission.
Ｖ２Ｘを説明するための図である。It is a figure for demonstrating V2X. Ｄ２Ｄを説明するための図である。It is a figure for demonstrating D2D. Ｄ２Ｄを説明するための図である。It is a figure for demonstrating D2D. Ｄ２Ｄ通信に用いられるＭＡＣ　ＰＤＵを説明するための図である。It is a figure for demonstrating MAC PDU used for D2D communication. ＳＬ－ＳＣＨ　ｓｕｂｈｅａｄｅｒのフォーマットを説明するための図である。It is a figure for demonstrating the format of SL-SCH subheader. Ｄ２Ｄで使用されるチャネル構造の例を説明するための図である。It is a figure for demonstrating the example of the channel structure used by D2D. 実施の形態に係る無線通信システムの構成例を示す図である。It is a figure which shows the structural example of the radio | wireless communications system which concerns on embodiment. ユーザ装置ＵＥのリソース選択動作を説明するための図である。It is a figure for demonstrating the resource selection operation | movement of the user apparatus UE. ユーザ装置ＵＥのリソース選択動作を説明するための図である。It is a figure for demonstrating the resource selection operation | movement of the user apparatus UE. ユーザ装置ＵＥのリソース選択動作を説明するための図である。It is a figure for demonstrating the resource selection operation | movement of the user apparatus UE. ユーザ装置ＵＥのリソース選択動作を説明するための図である。It is a figure for demonstrating the resource selection operation | movement of the user apparatus UE. 実施例１における基本的な動作例を説明するための図である。FIG. 7 is a diagram for describing a basic operation example in the first embodiment. 保護リソースセットの例を示す図である。It is a figure which shows the example of a protection resource set. 保護リソースセットの設定例を示す図である。It is a figure which shows the example of a setting of a protection resource set. 保護リソースセットの設定例を示す図である。It is a figure which shows the example of a setting of a protection resource set. リソース選択において候補リソースから保護リソースセットを除外することを説明する図である。It is a figure explaining excluding a protection resource set from candidate resources in resource selection. 実施例１におけるユーザ装置ＵＥの動作例を説明するためのフローチャートである。7 is a flowchart for explaining an operation example of the user apparatus UE in the first embodiment. 実施例２の動作例を説明するための図である。FIG. 7 is a diagram for explaining an operation example of the second embodiment. 実施例２の動作例を説明するための図である。FIG. 7 is a diagram for explaining an operation example of the second embodiment. 実施例３におけるＤＣＩの例を示す図である。FIG. 18 is a diagram showing an example of DCI in the third embodiment. 実施例３におけるＤＣＩの例を示す図である。FIG. 18 is a diagram showing an example of DCI in the third embodiment. 実施の形態に係るユーザ装置ＵＥの機能構成の一例を示す図である。It is a figure which shows an example of a function structure of the user apparatus UE which concerns on embodiment. 実施の形態に係る基地局１０の機能構成の一例を示す図である。It is a figure which shows an example of a function structure of base station 10 which concerns on embodiment. 実施の形態に係る基地局１０及びユーザ装置ＵＥのハードウェア構成の一例を示す図である。It is a figure which shows an example of the hardware constitutions of the base station 10 which concerns on embodiment, and the user apparatus UE.
　以下、図面を参照して本発明の実施の形態（本実施の形態）を説明する。なお、以下で説明する実施の形態は一例に過ぎず、本発明が適用される実施の形態は、以下の実施の形態に限られるわけではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.
　本実施の形態の無線通信システムは、少なくとも既存のＬＴＥの通信方式をサポートしていることを想定している。よって、無線通信システムが動作するにあたっては、適宜、既存のＬＴＥで規定された既存技術を使用できる。ただし、当該既存技術はＬＴＥに限られない。また、本明細書で使用する「ＬＴＥ」は、特に断らない限り、ＬＴＥ－Ａｄｖａｎｃｅｄ、及び、ＬＴＥ－Ａｄｖａｎｃｅｄ以降の方式を含む広い意味を有するものとする。 The wireless communication system according to the present embodiment is assumed to support at least the existing LTE communication scheme. Therefore, when the wireless communication system operates, the existing technology defined by the existing LTE can be used as appropriate. However, the existing technology is not limited to LTE. Also, “LTE” used in this specification has a broad meaning including LTE-Advanced and LTE-Advanced and later, unless otherwise specified.
　以下で説明する実施の形態では、既存のＬＴＥで使用されているチャネル名、信号名、モード名等の用語を使用しているが、これは記載の便宜上のためであり、これらと同様のチャネル、信号、モード名等が他の名称で呼ばれてもよい。 In the embodiments described below, terms such as channel names, signal names, mode names and the like used in existing LTE are used, but this is for the convenience of description and similar channels , Signals, mode names, etc. may be called by other names.
　また、本実施の形態は、主にＶ２Ｘを対象とすることを想定しているが、本実施の形態に係る技術は、Ｖ２Ｘに限らず、Ｄ２Ｄ全般に広く適用可能である。 Moreover, although this embodiment assumes that V2X is mainly targeted, the technology concerning this embodiment is widely applicable not only to V2X but D2D in general.
　また、本実施の形態における保護リソースセットは、一例として、モード４のユーザ装置によるＳＬ送信から、モード３のユーザ装置によるＳＬ送信を保護するものであることを示している。ただし、保護リソースセットを使用する仕組みは、モードに関わらずに、ＳＬ送信を行う複数ユーザ装置間において、ＳＬ送信を保護するために適用可能である。 Also, as an example, the protection resource set in the present embodiment indicates that SL transmission by the user apparatus in mode 3 is protected from SL transmission by the user apparatus in mode 4. However, the scheme of using the protection resource set is applicable to protect SL transmission between multiple user apparatuses that perform SL transmission regardless of the mode.
　（Ｄ２Ｄの概要）
　本実施の形態では、Ｄ２Ｄ（装置対装置通信）を基本技術とすることから、まず、ＬＴＥで規定されているＤ２Ｄの概要について説明する。 (Overview of D2D)
In the present embodiment, since D2D (device-to-device communication) is a basic technology, first, an outline of D2D defined in LTE will be described.
　既に説明したように、Ｄ２Ｄには、大きく分けて「Ｄ２Ｄディスカバリ」と「Ｄ２Ｄコミュニケーション」がある。「Ｄ２Ｄディスカバリ」については、図２Ａに示すように、Ｄｉｓｃｏｖｅｒｙ　ｐｅｒｉｏｄ毎に、Ｄｉｓｃｏｖｅｒｙメッセージ用のリソースプールが確保され、ユーザ装置はそのリソースプール内でＤｉｓｃｏｖｅｒｙメッセージ（発見信号）を送信する。より詳細にはＴｙｐｅ１、Ｔｙｐｅ２ｂがある。Ｔｙｐｅ１では、ユーザ装置が自律的にリソースプールから送信リソースを選択する。Ｔｙｐｅ２ｂでは、上位レイヤシグナリング（例えばＲＲＣ信号）により準静的なリソースが割り当てられる。 As described above, D2D is broadly divided into "D2D discovery" and "D2D communication". For “D2D discovery”, as shown in FIG. 2A, a resource pool for a Discovery message is secured for each Discovery period, and the user apparatus transmits a Discovery message (discovery signal) in the resource pool. There are Type 1 and Type 2b in more detail. In Type 1, the user apparatus autonomously selects a transmission resource from the resource pool. In Type 2b, semi-static resources are allocated by higher layer signaling (for example, RRC signaling).
　「Ｄ２Ｄコミュニケーション」についても、図２Ｂに示すように、ＳＣＩ（Ｓｉｄｅｌｉｎｋ　Ｃｏｎｔｒｏｌ　Ｉｎｆｏｒｍａｔｉｏｎ）／データ送信用のリソースプールが周期的に確保される。送信側のユーザ装置はＣｏｎｔｒｏｌリソースプール（ＰＳＣＣＨリソースプール）から選択されたリソースでＳＣＩによりデータ送信用リソース（ＰＳＳＣＨリソースプール）等を受信側に通知し、当該データ送信用リソースでデータを送信する。「Ｄ２Ｄコミュニケーション」について、より詳細には、モード１とモード２がある。モード１では、基地局からユーザ装置に送られる（Ｅ）ＰＤＣＣＨによりダイナミックにリソースが割り当てられる。モード２では、ユーザ装置はリソースプールから自律的に送信リソースを選択する。リソースプールについては、ＳＩＢで通知されたり、予め定義されたものが使用される。 Also in “D2D communication”, as shown in FIG. 2B, resource pools for SCI (Sidelink Control Information) / data transmission are periodically secured. The user apparatus on the transmission side notifies the reception side of a data transmission resource (PSSCH resource pool) or the like by the SCI using a resource selected from the Control resource pool (PSCCH resource pool), and transmits data using the data transmission resource. More specifically, “D2D communication” includes mode 1 and mode 2. In mode 1, resources are dynamically allocated by (E) PDCCH sent from the base station to the user apparatus. In mode 2, the user apparatus autonomously selects transmission resources from the resource pool. For resource pools, those notified by SIB or those defined in advance are used.
　また、Ｒｅｌ－１４では、モード１とモード２に加えて、モード３とモード４がある。Ｒｅｌ－１４では、ＳＣＩとデータとを同時に（１サブフレームで）、周波数方向に隣接したリソースブロックで送信することが可能である。なお、ＳＣＩをＳＡ（ｓｃｈｅｄｕｌｉｎｇ　ａｓｓｉｇｎｍｅｎｔ）と称する場合がある。 In Rel-14, in addition to mode 1 and mode 2, there are mode 3 and mode 4. In Rel-14, it is possible to transmit SCI and data simultaneously (in one subframe) in resource blocks adjacent in the frequency direction. The SCI may be referred to as SA (scheduling assignment).
　ＬＴＥにおいて、「Ｄ２Ｄディスカバリ」に用いられるチャネルはＰＳＤＣＨ（Ｐｈｙｓｉｃａｌ　Ｓｉｄｅｌｉｎｋ　Ｄｉｓｃｏｖｅｒｙ　Ｃｈａｎｎｅｌ）と称され、「Ｄ２Ｄコミュニケーション」におけるＳＣＩ等の制御情報を送信するチャネルはＰＳＣＣＨ（Ｐｈｙｓｉｃａｌ　Ｓｉｄｅｌｉｎｋ　Ｃｏｎｔｒｏｌ　Ｃｈａｎｎｅｌ）と称され、データを送信するチャネルはＰＳＳＣＨ（Ｐｈｙｓｉｃａｌ　Ｓｉｄｅｌｉｎｋ　Ｓｈａｒｅｄ　Ｃｈａｎｎｅｌ）と称される。ＰＳＣＣＨとＰＳＳＣＨはＰＵＳＣＨベースの構造を有し、ＤＭＲＳ（Ｄｅｍｏｄｕｌａｔｉｏｎ　Ｒｅｆｅｒｅｎｃｅ　Ｓｉｇｎａｌ、復調参照信号）が挿入される構造になっている。 In LTE, a channel used for "D2D discovery" is called PSDCH (Physical Sidelink Discovery Channel), and a channel for transmitting control information such as SCI in "D2D communication" is called PSCCH (Physical Sidelink Control Channel), and data The channel that transmits the channel is called PSSCH (Physical Sidelink Shared Channel). PSCCH and PSSCH have a PUSCH-based structure, in which DMRS (Demodulation Reference Signal) is inserted.
　Ｄ２Ｄに用いられるＭＡＣ（Ｍｅｄｉｕｍ　Ａｃｃｅｓｓ　Ｃｏｎｔｒｏｌ）ＰＤＵ（Ｐｒｏｔｏｃｏｌ　Ｄａｔａ　Ｕｎｉｔ）は、図３に示すように、少なくともＭＡＣ　ｈｅａｄｅｒ、ＭＡＣ　Ｃｏｎｔｒｏｌ　ｅｌｅｍｅｎｔ、ＭＡＣ　ＳＤＵ（Ｓｅｒｖｉｃｅ　Ｄａｔａ　Ｕｎｉｔ）、Ｐａｄｄｉｎｇで構成される。ＭＡＣ　ＰＤＵはその他の情報を含んでも良い。ＭＡＣ　ｈｅａｄｅｒは、１つのＳＬ－ＳＣＨ（Ｓｉｄｅｌｉｎｋ　Ｓｈａｒｅｄ　Ｃｈａｎｎｅｌ）ｓｕｂｈｅａｄｅｒと、１つ以上のＭＡＣ　ＰＤＵ　ｓｕｂｈｅａｄｅｒで構成される。 As shown in FIG. 3, a MAC (Medium Access Control) PDU (Protocol Data Unit) used for D2D includes at least a MAC header, a MAC control element, a MAC SDU (Service Data Unit), and Padding. The MAC PDU may contain other information. The MAC header is configured of one SL-SCH (Sidelink Shared Channel) subheader and one or more MAC PDU subheaders.
　図４に示すように、ＳＬ－ＳＣＨ　ｓｕｂｈｅａｄｅｒは、ＭＡＣ　ＰＤＵフォーマットバージョン（Ｖ）、送信元情報（ＳＲＣ）、送信先情報（ＤＳＴ）、Ｒｅｓｅｒｖｅｄ　ｂｉｔ（Ｒ）等で構成される。Ｖは、ＳＬ－ＳＣＨ　ｓｕｂｈｅａｄｅｒの先頭に割り当てられ、ユーザ装置が用いるＭＡＣ　ＰＤＵフォーマットバージョンを示す。送信元情報には、送信元に関する情報が設定される。送信元情報には、ＰｒｏＳｅ　ＵＥ　ＩＤに関する識別子が設定されてもよい。送信先情報には、送信先に関する情報が設定される。送信先情報には、送信先のＰｒｏＳｅ　Ｌａｙｅｒ－２　Ｇｒｏｕｐ　ＩＤに関する情報が設定されてもよい。 As shown in FIG. 4, the SL-SCH subheader is composed of a MAC PDU format version (V), transmission source information (SRC), transmission destination information (DST), reserved bit (R) and the like. V is assigned to the beginning of the SL-SCH subheader and indicates a MAC PDU format version used by the user apparatus. Information on the transmission source is set in the transmission source information. An identifier related to ProSe UE ID may be set in the transmission source information. Information on the transmission destination is set in the transmission destination information. In the destination information, information on the ProSe Layer-2 Group ID of the destination may be set.
　Ｄ２Ｄのチャネル構造の例を図５に示す。図５に示すように、「Ｄ２Ｄコミュニケーション」に使用されるＰＳＣＣＨのリソースプール及びＰＳＳＣＨのリソースプールが割り当てられている。また、「Ｄ２Ｄコミュニケーション」のチャネルの周期よりも長い周期で「Ｄ２Ｄディスカバリ」に使用されるＰＳＤＣＨのリソースプールが割り当てられている。 An example of a D2D channel structure is shown in FIG. As shown in FIG. 5, PSCCH resource pools and PSSCH resource pools used for “D2D communication” are allocated. In addition, PSDCH resource pools used for "D2D discovery" are allocated in a cycle longer than the channel cycle of "D2D communication".
　また、Ｄ２Ｄ用の同期信号としてＰＳＳＳ（Ｐｒｉｍａｒｙ　Ｓｉｄｅｌｉｎｋ　Ｓｙｎｃｈｒｏｎｉｚａｔｉｏｎ　ｓｉｇｎａｌ）とＳＳＳＳ（Ｓｅｃｏｎｄａｒｙ　Ｓｉｄｅｌｉｎｋ　Ｓｙｎｃｈｒｏｎｉｚａｔｉｏｎ　ｓｉｇｎａｌ）が用いられる。また、例えばカバレッジ外動作のためにＤ２Ｄのシステム帯域、フレーム番号、リソース構成情報等のブロードキャスト情報（ｂｒｏａｄｃａｓｔ　ｉｎｆｏｒｍａｔｉｏｎ）を送信するＰＳＢＣＨ（Ｐｈｙｓｉｃａｌ　Ｓｉｄｅｌｉｎｋ　Ｂｒｏａｄｃａｓｔ　Ｃｈａｎｎｅｌ）が用いられる。ＰＳＳＳ／ＳＳＳＳ及びＰＳＢＣＨは、１つのサブフレームで送信される。 Moreover, PSSS (Primary Sidelink Synchronization signal) and SSSS (Secondary Sidelink Synchronization signal) are used as synchronization signals for D2D. Also, for example, a PSBCH (Physical Sidelink Broadcast Channel) that transmits broadcast information such as a D2D system band, a frame number, and resource configuration information for out-of-coverage operation is used. PSSS / SSSS and PSBCH are transmitted in one subframe.
　（システム構成）
　図６は、本実施の形態に係る無線通信システムの構成例を示す図である。図６に示すように、本実施の形態に係る無線通信システムは、基地局１０、ユーザ装置ＵＥ１、及びユーザ装置ＵＥ２を有する。図６において、ユーザ装置ＵＥ１は送信側、ユーザ装置ＵＥ２は受信側を意図しているが、ユーザ装置ＵＥ１とユーザ装置ＵＥ２はいずれも送信機能と受信機能の両方を備える。以下、ユーザ装置ＵＥ１とユーザ装置ＵＥ２等を特に区別しない場合、単に「ユーザ装置ＵＥ」と記述する。また、本実施の形態に係る無線通信システムにおいて、図６に示す２つのユーザ装置ＵＥ以外にも多数のユーザ装置ＵＥが存在する。図６では、一例としてユーザ装置ＵＥ１とユーザ装置ＵＥ２がともにカバレッジ内にある場合を示しているが、本実施の形態における動作は、両方のユーザ装置ＵＥがカバレッジ内にある場合と、両方のユーザ装置ＵＥがカバレッジ外にある場合と、一方のユーザ装置ＵＥがカバレッジ内にあり、他方のユーザ装置ＵＥがカバレッジ外にある場合のいずれにも適用できる。 (System configuration)
FIG. 6 is a diagram showing an example of configuration of a wireless communication system according to the present embodiment. As shown in FIG. 6, the radio communication system according to the present embodiment includes a base station 10, a user apparatus UE1, and a user apparatus UE2. In FIG. 6, the user apparatus UE1 intends to be a transmitting side and the user apparatus UE2 is intended to be a receiving side, but both the user apparatus UE1 and the user apparatus UE2 have both a transmitting function and a receiving function. Hereinafter, the user apparatus UE1 and the user apparatus UE2 and the like will be simply described as "user apparatus UE" when not particularly distinguished. Moreover, in the radio | wireless communications system which concerns on this Embodiment, many user apparatuses UE exist other than two user apparatuses UE shown in FIG. Although FIG. 6 shows the case where both the user apparatus UE1 and the user apparatus UE2 are within the coverage as an example, the operation in the present embodiment is the case where both user apparatuses UE are within the coverage and both user's The present invention is applicable to either the case where the device UE is out of coverage or the case where one user device UE is in coverage and the other user device UE is out of coverage.
　ユーザ装置ＵＥは、それぞれ、ＬＴＥあるいはＮＲにおけるユーザ装置ＵＥとしてのセルラ通信の機能、及び、上述したチャネルでの信号送受信を含むＤ２Ｄ機能（無線により装置対装置通信を行う機能）を有している。また、ユーザ装置ＵＥは、本実施の形態で説明する動作を実行する送信側機能と受信側機能を有している。 Each of the user apparatuses UE has a function of cellular communication as the user apparatus UE in LTE or NR, and a D2D function (function of performing apparatus-to-device communication by radio) including signal transmission / reception in the above-mentioned channel . In addition, the user apparatus UE has a transmitting side function and a receiving side function that perform the operation described in the present embodiment.
　また、ユーザ装置ＵＥは、Ｄ２Ｄの機能を有するいかなる装置であってもよいが、例えば、ユーザ装置ＵＥは、車両、歩行者が保持する端末、ＲＳＵ（ＵＥの機能を有するＵＥタイプＲＳＵ）等である。 Also, the user apparatus UE may be any apparatus having the D2D function, but for example, the user apparatus UE may be a vehicle, a terminal held by a pedestrian, an RSU (UE type RSU having the UE function, etc.), etc. is there.
　また、ユーザ装置ＵＥのＤ２Ｄの送信の処理内容は基本的には、ＬＴＥでの上り送信の処理内容と同様である（非特許文献２）。例えば、ユーザ装置ＵＥは、送信データのコードワードをスクランブルし、変調してｃｏｍｐｌｅｘ－ｖａｌｕｅｄ　ｓｙｍｂｏｌｓを生成し、当該ｃｏｍｐｌｅｘ－ｖａｌｕｅｄ　ｓｙｍｂｏｌｓ（送信信号）を１又は２レイヤにマッピングし、プリコーディングを行う。そして、ｐｒｅｃｏｄｅｄ　ｃｏｍｐｌｅｘ－ｖａｌｕｅｄ　ｓｙｍｂｏｌｓをリソースエレメントにマッピングして、送信信号（例：ｃｏｍｐｌｅｘ－ｖａｌｕｅｄ　ｔｉｍｅ－ｄｏｍａｉｎ　ＳＣ－ＦＤＭＡ　ｓｉｇｎａｌ）を生成し、各アンテナポートから送信する。 Moreover, the processing content of D2D transmission of the user apparatus UE is fundamentally the same as the processing content of uplink transmission in LTE (non-patent document 2). For example, the user apparatus UE scrambles and modulates a codeword of transmission data to generate complex-valued symbols, maps the complex-valued symbols (transmission signal) to one or two layers, and performs precoding. Then, precoded complex-valued symbols are mapped to resource elements, a transmission signal (eg, complex-valued time-domain SC-FDMA signal) is generated, and transmitted from each antenna port.
　また、基地局１０については、ＬＴＥあるいはＮＲにおける基地局１０としてのセルラ通信の機能、及び、本実施の形態におけるユーザ装置ＵＥの通信を可能ならしめるための機能（ユーザ装置ＵＥへのリソースプール設定、リソース割り当て等）を有している。また、基地局１０は、ＲＳＵ（ｅＮＢの機能を有するｅＮＢタイプＲＳＵ）であってもよい。 Also, for base station 10, a function of cellular communication as base station 10 in LTE or NR, and a function for enabling communication of user apparatus UE in the present embodiment (resource pool setting for user apparatus UE) , Resource allocation, etc.). Further, the base station 10 may be an RSU (eNB type RSUs having an eNB function).
　また、本実施の形態に係る無線通信システムにおいて、ユーザ装置ＵＥがサイドリンクに使用する信号波形は、ＯＦＤＭＡであってもよいし、ＳＣ－ＦＤＭＡであってもよいし、その他の信号波形であってもよい。また、本実施の形態に係る無線通信システムにおいては、既存のＬＴＥと同様に、時間方向には、複数のサブフレーム（例：１０個のサブフレーム）からなるフレームが形成され、周波数方向は複数のサブキャリアからなる。１サブフレームは１送信時間間隔（ＴＴＩ：Ｔｒａｎｓｍｉｓｓｉｏｎ　Ｔｉｍｅ　Ｉｎｔｅｒｖａｌ）の一例である。サブフレーム以外の時間長（例：スロット）が送信時間間隔として使用されてもよい。 Further, in the radio communication system according to the present embodiment, the signal waveform used by the user apparatus UE for the side link may be OFDMA, SC-FDMA, or any other signal waveform. May be Further, in the radio communication system according to the present embodiment, as in the existing LTE, a frame consisting of a plurality of subframes (eg, 10 subframes) is formed in the time direction, and a plurality of frequency directions are provided. Consists of sub-carriers of One subframe is an example of one transmission time interval (TTI). Time lengths other than subframes (eg, slots) may be used as transmission time intervals.
　本実施の形態では、ユーザ装置ＵＥは、自律的にＳＬ信号送信のためのリソースを選択するモード（以降、モード４と呼ぶ）、基地局１０からＳＬ信号送信のためのリソースが割り当てられるモード（以降、モード３と呼ぶ）のいずれのモードも取り得る。モードは、例えば、基地局１０からユーザ装置ＵＥに設定される。 In the present embodiment, the user apparatus UE autonomously selects a resource for SL signal transmission (hereinafter referred to as mode 4), and a mode in which a resource for SL signal transmission is assigned from the base station 10 ( Hereinafter, any mode of mode 3) can be taken. The mode is set, for example, from the base station 10 to the user apparatus UE.
　モード４においては、図７に示すように、モード４の各ユーザ装置ＵＥは、同期した共通の時間・周波数グリッドから無線のリソースを選択する。図７は、１サブフレームが１ｍｓである例を示すが、これは一例に過ぎない。 In mode 4, as shown in FIG. 7, each user apparatus UE in mode 4 selects a radio resource from a synchronized common time-frequency grid. FIG. 7 shows an example in which one subframe is 1 ms, but this is merely an example.
　本実施の形態の説明において、１サブチャネルは１又は複数のリソースブロックの帯域幅を有する。あるリソースは、例えば、サブフレーム番号と、サブチャネル番号（あるいはリソースブロック番号）で識別可能である。また、サブフレームとサブチャネル（あるいはリソースブロック）のグリッドに番号が付される場合には、あるリソースは当該番号で識別可能である。本実施の形態で記載される「予約リソースの情報」は、例えば、上記のサブフレーム番号、サブチャネル番号（あるいはリソースブロック番号）、リソース番号のいずれか１つ又は複数である。 In the description of the present embodiment, one subchannel has the bandwidth of one or more resource blocks. A certain resource can be identified by, for example, a subframe number and a subchannel number (or resource block number). In addition, when a grid of subframes and subchannels (or resource blocks) is numbered, a certain resource can be identified by the number. The “information on reserved resource” described in the present embodiment is, for example, any one or more of the above-mentioned subframe number, subchannel number (or resource block number), and resource number.
　モード４におけるリソース選択の動作例として、図８～図１０を参照してユーザ装置ＵＥがＳＬ信号（データ、又は、制御情報、又は、データと制御情報）を送信するために使用するリソースを自律的に選択する動作について説明する。図８～図１０を参照して説明する動作は、非特許文献１等に規定されている動作である。 As an operation example of resource selection in mode 4, referring to FIGS. 8 to 10, the resource used by the user apparatus UE to transmit an SL signal (data or control information or data and control information) is autonomous The operation to be selected will be described. The operations described with reference to FIGS. 8 to 10 are the operations defined in Non-Patent Document 1 and the like.
　図８に示すように、ユーザ装置ＵＥはバックグラウンドでセンシングを行っている。センシングにおいて、ユーザ装置ＵＥは、制御情報（リソース予約情報、優先度等が含まれる）の読み取りと電力検出による干渉パターンの測定を行う。そして、ユーザ装置ＵＥは、送信パケット発生時に、例えば過去１０００ｍｓ間のセンシングの結果に基づき、リソース選択ウィンドウ内での干渉が低い複数のリソース（候補リソース）の中から最大２つのリソースを選択し、当該リソースを使用してＳＬ信号を送信する。なお、２つのリソースは、初送のリソースと再送のリソースに相当する。また、本実施の形態では、このように最大２回送信に限定されるわけではなく、３回以上の送信を行ってもよい。なお、候補リソースは、基地局１０からユーザ装置ＵＥに設定される（あるいはユーザ装置ＵＥに事前設定される）リソースプール内のリソースである。 As shown in FIG. 8, the user apparatus UE performs sensing in the background. In sensing, the user apparatus UE measures interference patterns by reading control information (including resource reservation information, priority, etc.) and power detection. Then, at the time of transmission packet generation, the user apparatus UE selects up to two resources from among a plurality of resources (candidate resources) with low interference in the resource selection window, based on the result of sensing for the past 1000 ms, for example The SL signal is transmitted using the resource. The two resources correspond to the initial transmission resource and the retransmission resource. Further, in the present embodiment, the transmission is not limited to the maximum of two transmissions as described above, and three or more transmissions may be performed. The candidate resource is a resource in a resource pool which is set from the base station 10 to the user apparatus UE (or preset in the user apparatus UE).
　ＳＬ信号の送信は周期的に行われる。また、リソースの予約が行われる。具体的には、ある送信周期でのＳＬ信号には、データのスケジュール情報とともに次の送信周期で送信に使用される予約されたリソースの情報が含まれている。また、図８に示すような２回送信において、各送信におけるＳＬ信号（具体的には制御情報）には、自身の予約リソースの情報とともに、他方の送信の予約リソースの情報が含まれている。 Transmission of the SL signal is performed periodically. Also, resource reservation is performed. Specifically, the SL signal in a certain transmission cycle includes information on reserved resources used for transmission in the next transmission cycle together with data schedule information. In addition, in the two-time transmission as shown in FIG. 8, the SL signal (specifically, control information) in each transmission includes the information of the other transmission reservation resource as well as the information of its own reservation resource. .
　ここで、周期的な送信において、ユーザ装置ＵＥが各送信周期で同じリソースを使用し続けると、送信するパケットが他のユーザ装置ＵＥから送信されたパケットと衝突し続ける可能性がある。しかし、ユーザ装置ＵＥは、自分の送信パケットと他のユーザ装置ＵＥの送信パケットとが衝突しているか否かを検出できない。そこで、リソースの再選択を行うためのリセレクションカウンタが規定されている。図９に示すように、最初の周期の送信時から送信の度にリセレクションカウンタが減算され、ユーザ装置ＵＥは、リセレクションカウンタが０になる時点でリソースの再選択を行う。 Here, in the periodic transmission, if the user apparatus UE continues to use the same resource in each transmission cycle, the packet to be transmitted may continue to collide with packets transmitted from other user apparatuses UE. However, the user apparatus UE can not detect whether or not its transmission packet and the transmission packet of another user apparatus UE collide. Therefore, a reselection counter for reselecting resources is defined. As shown in FIG. 9, the reselection counter is decremented each time transmission is performed from the transmission of the first cycle, and the user apparatus UE reselects resources when the reselection counter becomes zero.
　なお、本明細書の説明において、「リソース選択」は、その意味として、送信パケットが新たに発生した場合におけるリソース選択とともに、上記のようなリソース再選択を含むものとする。 In the description of the present specification, “resource selection” includes, as its meaning, resource reselection as described above as well as resource selection when a transmission packet is newly generated.
　図１０を参照して、本実施の形態のユーザ装置ＵＥにおけるリソース選択動作の手順を説明する。なお、図１０は基本的な動作を示すものであり、本実施の形態では、後述するように、保護リソースセットを考慮した処理が実行される。 A procedure of resource selection operation in the user apparatus UE of the present embodiment will be described with reference to FIG. FIG. 10 shows a basic operation, and in the present embodiment, as will be described later, a process taking into account the protected resource set is executed.
　ステップＳ１において、ユーザ装置ＵＥはモニタしていないリソースを候補リソースから除外する。ここでは、Ｈａｌｆ　ｄｕｐｌｅｘの制限のため、ユーザ装置ＵＥは送信に使用したリソースのサブフレームをモニタできないので、当該サブフレーム全体のリソースが候補リソースから除外される。 In step S1, the user apparatus UE excludes the resource not monitored from the candidate resources. Here, since the user apparatus UE can not monitor the subframe of the resource used for transmission due to the limitation of the Half duplex, the resource of the entire subframe is excluded from the candidate resources.
　ステップＳ２において、ユーザ装置ＵＥは、センシングにおいて受信した他のユーザ装置ＵＥの制御情報を復号することにより、予約されたリソース（他のユーザ装置の送信リソース）を把握し、当該リソースを候補リソースから除外する。より詳細には、ユーザ装置ＵＥは、１０００ｍｓのセンシング区間内における予約されたリソースのうち、当該リソース（具体的にはＰＳＳＣＨ）における参照信号の受信電力（Ｓ－ＲＳＲＰ、以下、ＲＳＲＰと記述する）が閾値以上のリソースを除外する。ここで、残存候補リソースが全体の２０％以下となる場合には閾値を３ｄＢ増加させることで２０％以上の候補リソースが残るように調整が行われる。 In step S2, the user apparatus UE grasps the reserved resource (transmission resource of the other user apparatus) by decoding the control information of the other user apparatus UE received in the sensing, and uses the resources from the candidate resources. exclude. More specifically, the user apparatus UE receives the reference signal reception power (S-RSRP, hereinafter referred to as RSRP) in the resource (specifically, PSSCH) among the reserved resources in the sensing section of 1000 ms. Excludes resources above the threshold. Here, when the remaining candidate resources are 20% or less of the whole, adjustment is performed such that 20% or more candidate resources remain by increasing the threshold by 3 dB.
　ステップＳ３において、ユーザ装置ＵＥは、残りの候補リソースの中で、Ｓ－ＲＳＳＩ（ＲＳＳＩと称してもよう）に基づき干渉量の少ないリソースを２割選択する。より詳細には、各サブチャネルの受信電力（Ｓ－ＲＳＳＩ）を１００ｍｓ周期で評価した結果から、レベルが低い２０％のリソースを候補として残す。なお、１００ｍｓ周期とするのは一例に過ぎない。 In step S3, the user apparatus UE selects, among the remaining candidate resources, two resources having a small amount of interference based on S-RSSI (also referred to as RSSI). More specifically, from the result of evaluating the received power (S-RSSI) of each subchannel in a cycle of 100 ms, 20% of resources with low levels are left as candidates. Note that the cycle of 100 ms is merely an example.
　ステップＳ４において、ユーザ装置ＵＥは、ステップＳ３の時点で残っている候補リソースの中からランダムに送信リソースを選択する。ここで、ランダムに送信リソースを選択するのは、近傍のＵＥ群の干渉状態は似ている可能性が高く、最も干渉が少ないリソースを選択すると、近傍ＵＥ間でパケット衝突が生じる確率が高いためである。 In step S4, the user apparatus UE randomly selects a transmission resource from the candidate resources remaining at the time of step S3. Here, the reason for selecting transmission resources at random is that there is a high possibility that the interference states of the neighboring UEs are similar, and if the resource with the least interference is selected, the probability of occurrence of packet collision between neighboring UEs is high. It is.
　ステップＳ２で用いられるＲＳＲＰの閾値は、パケットの優先度であるＰＰＰＰ（ＰｒｏＳｅ　ｐｅｒ　ｐａｃｋｅｔ　ｐｒｉｏｒｉｔｙ）毎に設定された値（あるいは事前設定された値）が用いられる。 As the RSRP threshold value used in step S2, a value (or a pre-set value) set for each PPPP (Pros Per Packet Priority), which is the priority of the packet, is used.
　送信側のユーザ装置ＵＥにおいては、例えば、パケットの論理チャネル種別に応じて当該パケットの優先度が決定され、当該パケットの送信リソース（あるいは予約リソース）を示す制御情報（ＳＣＩ）の中に当該優先度が含められる。リソース選択を行うユーザ装置ＵＥは、受信する制御情報から優先度（受信側の優先度）を取得する。また、ユーザ装置ＵＥは、リソース選択を行う際に送信しようとしている自身のパケットの優先度（送信側の優先度）を有している。ステップＳ２で用いられるＲＳＲＰの閾値は、この「受信側の優先度と送信側の優先度」毎に決められる。例えば、優先度（ＰＰＰＰ）の値が８種類(例：１～８)あるとすると、閾値は、８×８＝６４種類存在する。非特許文献３には、「thresPSSCH-RSRP-List」が、「Indicates a list of 64 thresholds, and the threshold should be selected based on the priority in the decoded SCI and the priority in the SCI to be transmitted (see TS 36.213 [23]). A resource is excluded if it is indicated or reserved by a decoded SCI and PSSCH RSRP in the associated data resource is above a threshold.」として規定され、当該リストの値である「SL-ThresPSSCH-RSRP」が、「Value 0 corresponds to minus infinity dBm, value 1 corresponds to -128dBm, value 2 corresponds to -126dBm, value n corresponds to (-128 + (n-1)*2) dBm and so on, value 66 corresponds to infinity dBm.」として規定されている。 In the user apparatus UE on the transmitting side, for example, the priority of the packet is determined according to the logical channel type of the packet, and the priority is included in control information (SCI) indicating the transmission resource (or reserved resource) of the packet. Degree is included. The user apparatus UE performing resource selection acquires the priority (priority on the receiving side) from the received control information. Moreover, the user apparatus UE has the priority (priority by the side of transmission) of the packet of the self which it is going to transmit, when performing resource selection. The threshold value of RSRP used in step S2 is determined for each of the "priority on the receiving side and the priority on the transmitting side". For example, assuming that there are eight types of priority (PPPP) values (eg, 1 to 8), there are 8 × 8 = 64 types of threshold values. In Non-Patent Document 3, “thresPSSCH-RSRP-List” is “Indicates a list of 64 thresholds, and the threshold should be selected based on the priority in the decoded SCI and the priority in the SCI to be transmitted (see TS 36.213 [23]) A resource is excluded if it is indicated or reserved by a decoded SCI and PSSCH RSRP in the associated data resource is above a threshold. "Value 0 corresponds to minus infinity dBm, value 1 corresponds to -128 dBm, value 2 corresponds to -126 dBm, value n corresponds to (-128 + (n-1) * 2) dBm and so on, value 66 corresponds" to infinity dBm. ”.
　なお、上記のような優先度と閾値とのマッピングは一例であり、例えば、送信側の優先度に関わらずに、受信側の優先度が閾値と対応付けられていてもよい。 The mapping between the priority and the threshold as described above is an example, and the priority on the reception side may be associated with the threshold regardless of the priority on the transmission side, for example.
　（共有リソースプールについて）
　上述したように、モード４においては、ユーザ装置ＵＥは、リソースプールの中から、ＳＬ信号の送信に使用するリソースを選択する。また、モード３においては、基地局１０は、モード３用のリソースプールから選択したリソースをユーザ装置ＵＥに割り当てる。 (About shared resource pool)
As described above, in mode 4, the user apparatus UE selects a resource to be used for SL signal transmission from the resource pool. Further, in mode 3, the base station 10 allocates the resource selected from the resource pool for mode 3 to the user apparatus UE.
　モード３用のリソースプール、モード４用のリソースプールのいずれにおいても、リソースプールはユーザ装置ＵＥ個別に設定されてもよいし、セル内で共通に設定されてもよいし、あるグループの複数ユーザ装置ＵＥに対して共通に設定されてもよい。本実施の形態では、リソースプールはセル内で共通に設定される、あるいは、あるグループの複数ユーザ装置ＵＥに対して共通に設定されることを想定している。 In any of the resource pool for mode 3 and the resource pool for mode 4, the resource pool may be set individually for each user apparatus UE, may be set commonly in the cell, or multiple users of a certain group It may be set commonly for the devices UE. In the present embodiment, it is assumed that the resource pool is commonly set in the cell, or commonly set for a plurality of user apparatuses UE in a certain group.
　ここで、モード３用のリソースプールと、モード４用のリソースプールは、時間・周波数領域で重複しないように設定してもよいし、一部又は全部が重複してもよい。 Here, the resource pool for mode 3 and the resource pool for mode 4 may be set so as not to overlap in the time / frequency domain, or part or all may overlap.
　モード３用のリソースプールと、モード４用のリソースプールが重複する部分のリソースプールを共有リソースプール（ｓｈａｒｅｄ　ｒｅｓｏｕｒｃｅ　ｐｏｏｌ）と呼ぶ。 The resource pool for mode 3 and the resource pool of the part where the resource pool for mode 4 overlaps is called a shared resource pool (shared resource pool).
　以下、記載の便宜上、モード４のユーザ装置ＵＥとして「モード４ＵＥ」を適宜使用し、モード３のユーザ装置ＵＥとして「モード３ＵＥ」を適宜使用する。 Hereinafter, for convenience of description, “mode 4 UE” is appropriately used as the user apparatus UE in mode 4 and “mode 3 UE” is appropriately used as the user apparatus UE in mode 3.
　ここで、あるセルにおいて、モード３用リソースプールとモード４用リソースプールが設定され、これらのリソースプールが重複しているとする。つまり、共有リソースプールが設定されている場合を想定する。 Here, in a certain cell, it is assumed that a mode 3 resource pool and a mode 4 resource pool are set, and these resource pools overlap. That is, it is assumed that a shared resource pool is set.
　この場合、モード３ＵＥには、ＳＬ信号送信のために、当該共有リソースプール内のリソースが基地局１０から割り当てられる。また、モード４ＵＥは、ＳＬ信号送信のために、当該共有リソースプール内のリソースを選択する。 In this case, in the mode 3 UE, resources in the shared resource pool are allocated from the base station 10 for SL signal transmission. Also, mode 4 UE selects a resource in the shared resource pool for SL signal transmission.
　従って、例えば、モード４ＵＥが、ＳＬ信号送信のために、モード３ＵＥによりＳＬ信号送信に使用されるリソースを選択する場合がある。その場合、ＳＬ信号の衝突が発生する。また、モード３ＵＥに対し、ＳＬ信号送信のために、モード４ＵＥによりＳＬ信号送信に使用されるリソースが割り当てられる場合がある。その場合も、ＳＬ信号の衝突が発生する。 Thus, for example, mode 4 UE may select the resources used for SL signaling by mode 3 UE for SL signaling. In that case, a collision of SL signals occurs. Also, for mode 3 UE, resources used for SL signal transmission may be allocated by mode 4 UE for SL signal transmission. Also in this case, collisions of SL signals occur.
　ここで、モード４ＵＥは、センシングにより、モード３ＵＥと他のモード４ＵＥのいずれにも使用されない空きのリソースを選択し得る。しかし、モード３ＵＥにリソースを割り当てる基地局１０は、通常、モード４ＵＥにより選択されるリソースを把握できないため、モード３ＵＥは、モード４ＵＥからの干渉を受け易い。以下、この問題を解消するための例として、実施例１、実施例２、実施例３を説明する。実施例１～３はそれぞれ単独で実施してもよいし、任意に組み合わせて実施することとしてもよい。 Here, mode 4 UE may select a vacant resource not used for mode 3 UE or any other mode 4 UE by sensing. However, since the base station 10 that allocates resources to mode 3 UE can not usually grasp the resources selected by mode 4 UE, mode 3 UE is susceptible to interference from mode 4 UE. Hereinafter, Example 1, Example 2, and Example 3 will be described as an example for solving this problem. Embodiments 1 to 3 may be practiced alone or in any combination.
　（実施例１）
　実施例１では、共有リソースプールにおいて、保護リソースセット（protected resource set）が設定される。ただし、保護リソースセットが、共有リソースプールに設定されることは必須でなく、例えば、モード３用リソースプールとモード４用リソースプールに重複部分が有るか否かに関わらず（つまり、共有リソースプールが有るか否かに関わらず）に、モード４ＵＥに対し、モード用４リソースプールとともに、保護リソースセットが設定されることとしてもよい。 Example 1
In the first embodiment, a protected resource set is set in the shared resource pool. However, it is not essential that the protection resource set is set in the shared resource pool, for example, regardless of whether there is an overlap between the mode 3 resource pool and the mode 4 resource pool (that is, the shared resource pool The protected resource set may be set for the mode 4 UE together with the mode 4 resource pool, regardless of whether or not
　モード４ＵＥは、モード４用リソースプールにおける、保護リソースセットの外側のリソースを保護リソースセットの内側のリソースよりも優先して選択する。また、基地局１０は、例えば、保護リソースセット内のリソースを高優先で選択し、モード３ＵＥに割り当てる。 Mode 4 UE selects a resource outside the protection resource set in the resource pool for mode 4 in preference to a resource inside the protection resource set. Also, the base station 10, for example, selects a resource in the protection resource set with high priority and assigns it to the mode 3 UE.
　実施例１における基本的な動作例を図１１に示す。図１１に示すように、基地局１０はユーザ装置ＵＥ（モード４ＵＥを想定）に対して、ＲＲＣシグナリング等の上位レイヤシグナリングで設定情報を送信する（Ｓ１０１）。当該設定情報には、モード４用リソースプールの設定情報と、保護リソースセットの設定情報が含まれる。なお、モード４用リソースプールが既にユーザ装置ＵＥに設定されている場合には、Ｓ１０１の設定情報に、モード４用リソースプールの設定情報が含まれずに、保護リソースセットの設定情報が含まれることとしてもよい。 A basic operation example in the first embodiment is shown in FIG. As shown in FIG. 11, the base station 10 transmits configuration information to the user apparatus UE (assuming mode 4 UE) by higher layer signaling such as RRC signaling (S101). The setting information includes setting information of a mode 4 resource pool and setting information of a protection resource set. When the mode 4 resource pool is already set in the user apparatus UE, the setting information of the S101 does not include the setting information of the mode 4 resource pool but includes the setting information of the protection resource set. It may be
　また、上記の例では、モード４用リソースプール及び／又は保護リソースセットが基地局１０からユーザ装置ＵＥに設定される例を示しているが、これは例であり、モード４用リソースプール及び／又は保護リソースセットは、ユーザ装置ＵＥに事前設定されていてもよい。 In the above example, although the mode 4 resource pool and / or the protection resource set is set from the base station 10 to the user apparatus UE, this is an example, and the mode 4 resource pool and / or Alternatively, the protection resource set may be preset in the user apparatus UE.
　Ｓ１０２において、ユーザ装置ＵＥは、設定された保護リソースセットを考慮してＳＬ通信動作（リソース選択動作等）を行う。保護リソースセットを考慮したリソース選択動作の詳細は後述する。 In S102, the user apparatus UE performs SL communication operation (resource selection operation etc.) in consideration of the set protection resource set. Details of the resource selection operation in consideration of the protection resource set will be described later.
　＜保護リソースセットの設定例＞
　図１２は、保護リソースセットの設定例を示す図である。ここでは、Ｒｅｌ－１４（リリース１４）のユーザ装置ＵＥ（Ｒｅｌ－１４ＵＥ）は、保護リソースセットを認識できず、Ｒｅｌ－１５（リリース１５）のユーザ装置ＵＥ（Ｒｅｌ－１５ＵＥ）は、保護リソースセットを認識できることを想定している。ただし、このような想定は一例に過ぎない。 <Example of setting protected resource set>
FIG. 12 is a diagram illustrating an example of setting of a protection resource set. Here, the Rel-14 (release 14) user equipment UE (Rel-14 UE) can not recognize the protection resource set, and the Rel-15 (release 15) user equipment UE (Rel-15 UE) does not recognize the protection resource set. It is assumed that you can recognize However, such an assumption is only an example.
　図１２の例では、モード４のＲｅｌ－１５ＵＥに設定されるリソースプール、モード３のＲｅｌ－１５ＵＥに設定されるリソースプールが重複し、共有リソースプールになっている。また、モード４のＲｅｌ－１４ＵＥに設定されるリソースプールと、モード３のＲｅｌ－１４ＵＥに設定されるリソースプールは、直交する（重複しない）。モード４のＲｅｌ－１４ＵＥに設定されるリソースプールとモード３のＲｅｌ－１４ＵＥに設定されるリソースプールを合わせたリソースプールは、上述した共有リソースプールと重複している。 In the example of FIG. 12, the resource pool set in Rel-15 UE in mode 4 and the resource pool set in Rel-15 UE in mode 3 overlap, and become a shared resource pool. Also, the resource pool configured for Rel-14 UE in mode 4 and the resource pool configured for Rel-14 UE in mode 3 are orthogonal (do not overlap). A resource pool in which the resource pool set in Rel-14 UE in mode 4 and the resource pool set in Rel-14 UE in mode 3 are the same as the shared resource pool described above.
　図１２に示す例においては、共有リソースプールにおける周波数方向の上半分の領域が保護リソースセットとして設定されている。図１２に示す例において、例えば、当該保護リソースセットは、Ｒｅｌ－１５のモード４ＵＥに対してモード４用リソースプールとともに設定される。Ｒｅｌ－１５のモード３ＵＥに対しては、当該保護リソースセットは設定されなくてもよい（基地局１０が認識する）し、設定されてもよい。Ｒｅｌ－１４のＵＥに対しては、保護リソースセットは設定されない（設定できない）。 In the example illustrated in FIG. 12, the upper half area in the frequency direction in the shared resource pool is set as a protection resource set. In the example illustrated in FIG. 12, for example, the protection resource set is configured together with the mode 4 resource pool for the mode 4 UE of Rel-15. For the Rel-15 mode 3 UE, the protection resource set may not be set (the base station 10 recognizes) and may be set. The protection resource set is not configured (cannot be configured) for Rel-14 UEs.
　Ｒｅｌ－１４のＵＥに対しては、図１２のように、保護リソースセットに重なるリソース部分をモード３用のリソースプールとすることで、Ｒｅｌ－１４のＵＥのモード３用リソースプールを保護できる。また、モード４のＲｅｌ－１４ＵＥに設定されるリソースプールと、モード３のＲｅｌ－１４ＵＥに設定されるリソースプールとを直交させることで、モード４のＲｅｌ－１４ＵＥとモード３のＲｅｌ－１４ＵＥとの間の干渉を回避できる。 For the Rel-14 UE, as shown in FIG. 12, the resource pool for the Rel-14 UE can be protected by setting the resource portion overlapping the protection resource set as the mode 3 resource pool. Also, by orthogonalizing the resource pool set in Rel-14 UE in mode 4 and the resource pool set in Rel-14 UE in mode 3, Rel-14 UE in mode 4 and Rel-14 UE in mode 3 Interference can be avoided.
　以下の説明では、特に断らない限り、ユーザ装置ＵＥ（モード３ＵＥ，モード４ＵＥ）は保護リソースセットを認識できるものとする。ただし、モード３ＵＥは保護リソースセットを認識できなくてもよい。 In the following description, it is assumed that the user equipment UE (mode 3 UE, mode 4 UE) can recognize the protected resource set unless otherwise specified. However, mode 3 UE may not recognize the protection resource set.
　例えば、保護リソースセットは、開始サブチャネルインデックス又は開始サブキャリアインデックス、及び保護リソースセットの周波数領域における長さによりユーザ装置ＵＥに設定される。すなわち、この場合、Ｘ個のサブチャネルあるいはＸ個のサブキャリアが保護リソースセットとしてユーザ装置ＵＥに設定される。この場合の保護リソースセットの例を図１３Ａに示す。図１３Ａの例では、リソースプール（例：モード４用リソースプール）の時間長全体にわたり、リソースプールの一部の周波数領域が保護リソースセットとして設定される。 For example, the protection resource set is set to the user equipment UE by the start subchannel index or start subcarrier index and the length in the frequency domain of the protection resource set. That is, in this case, X subchannels or X subcarriers are set in the user apparatus UE as a protection resource set. An example of a protection resource set in this case is shown in FIG. 13A. In the example of FIG. 13A, a partial frequency region of the resource pool is set as a protection resource set over the entire time length of the resource pool (eg, resource pool for mode 4).
　なお、図１３Ａに示す「リソースプール」は、共有リソースプールであってもよい。図１３Ａに示す「リソースプール」が共有リソースプールである場合、例えば、基地局１０は、当該共有リソースプールに該当するモード３用リソースプールにおいて、当該保護リソースプールを考慮して、ＳＬ信号送信用のリソース割り当てをモード３ＵＥに対して行う。 The “resource pool” illustrated in FIG. 13A may be a shared resource pool. When “resource pool” shown in FIG. 13A is a shared resource pool, for example, the base station 10 is for SL signal transmission in consideration of the protected resource pool in the mode 3 resource pool corresponding to the shared resource pool. Resource allocation to the mode 3 UE.
　保護リソースセットは、開始サブチャネルインデックス又は開始サブキャリアインデックス、及び保護リソースセットの周波数領域における長さに加えて、時間領域を指定する形で設定されてもよい。時間領域の指定は、例えば、開始サブフレームインデックス、時間長、及び周期を用いてなされる。この場合の保護リソースセットの例を図１３Ｂに示す。図１３Ｂの例では、開始サブチャネルインデックス、及び周波数方向の長さにより保護リソースセットの周波数領域が指定され、更に、開始サブフレーム、時間長、及び周期により、保護リソースセットの時間領域が指定される。 The protection resource set may be configured to specify a time domain in addition to the start subchannel index or start subcarrier index and the length in the frequency domain of the protection resource set. The designation of the time domain is made, for example, using the start subframe index, the time length, and the period. An example of a protection resource set in this case is shown in FIG. 13B. In the example of FIG. 13B, the start subchannel index and the length in the frequency direction designate the frequency domain of the protection resource set, and the start subframe, the time length and the period designate the time domain of the protection resource set. Ru.
　＜ユーザ装置ＵＥのリソース選択動作＞
　次に、保護リソースセットが設定されたユーザ装置ＵＥ（ここではモード４ＵＥ）のリソース選択動作例を説明する。以下、オプションＡ、オプションＢ、オプションＡとオプションＢの組み合わせを説明する。 <Resource Selection Operation of User Equipment UE>
Next, an example of resource selection operation of the user apparatus UE (here, mode 4 UE) in which the protection resource set is set will be described. The combination of Option A, Option B, Option A and Option B will be described below.
　（１）オプションＡ
　ユーザ装置ＵＥは、基本的に、図８～図１０を参照して説明したセンシングベースのリソース選択を行う。ただし、オプションＡでは、センシングの際の受信電力（ＲＳＲＰあるいはＲＳＳＩ）の測定において、保護リソースセット内のリソースでの受信電力にオフセットを適用し、オフセット適用後の受信電力を用いてリソース選択を行う。当該オフセットは、基地局１０からユーザ装置ＵＥに上位レイヤシグナリングで設定されることとしてもよいし、ユーザ装置ＵＥに事前設定されていてもよい。 (1) Option A
The user apparatus UE basically performs the sensing based resource selection described with reference to FIGS. 8 to 10. However, Option A applies an offset to the received power in the resources in the protected resource set and performs resource selection using the received power after applying the offset in the measurement of received power (RSRP or RSSI) at the time of sensing. . The offset may be set by the upper layer signaling from the base station 10 to the user apparatus UE, or may be preset in the user apparatus UE.
　例えば、ユーザ装置ＵＥは、図１０のＳ２におけるＲＳＲＰに基づく候補リソースからのリソース除外処理において、保護リソースセット内のリソースで測定したＲＳＲＰの値（Ｍとする）に、オフセット（正の値Ｓ１とする）を加えた値（Ｍ＋Ｓ１）をリソース除外判定で使用するＲＳＲＰとする。この場合、例えば、閾値がＭ＋Ｓ２（Ｓ２＜Ｓ１）であるとすると、Ｍ＜閾値となるので、オフセットを用いない場合には、当該リソースは候補リソースから除外されない。 For example, in the resource exclusion process from the candidate resource based on RSRP in S2 of FIG. 10, the user apparatus UE offsets (a positive value S1) to the value (M) of RSRP measured in the resource in the protected resource set. The value (M + S1) obtained by adding) is used as RSRP used in resource exclusion determination. In this case, for example, assuming that the threshold is M + S2 (S2 <S1), M <threshold. Therefore, when the offset is not used, the resource is not excluded from the candidate resources.
　一方、Ｍ＋Ｓ１＞閾値となるので、オフセットを用いる場合には、当該リソースは候補リソースから除外される。よって、保護リソースセット内のリソースに対しオフセットを適用することで、保護リソースセット内のリソースがＳＬ信号の送信リソースとして選択される可能性を下げることができ、保護リソースセット内のリソースを用いて実行され得るモード３ＵＥによるＳＬ信号送信を保護できる。 On the other hand, since M + S1> threshold, when using an offset, the resource is excluded from candidate resources. Therefore, applying the offset to the resources in the protection resource set can reduce the possibility that the resources in the protection resource set are selected as transmission resources for the SL signal, and using the resources in the protection resource set It can protect SL signal transmission by mode 3 UE that can be implemented.
　また、例えば、ユーザ装置ＵＥは、図１０のＳ３におけるＲＳＳＩに基づく候補リソースからのリソース除外処理において、保護リソースセット内のリソースで測定したＲＳＳＩの値（Ｋとする）に、オフセット（正の値Ｌ１とする）を加えた値（Ｋ＋Ｌ１）をリソース除外判定で使用するＲＳＳＩとする。この場合、保護リソースセット内のリソースは、干渉量の低いリソースとして、候補リソースに残る可能性が減少する。よって、保護リソースセット内のリソースに対し、オフセットを適用することで、保護リソースセット内のリソースがＳＬ信号の送信リソースとして選択される可能性を下げることができ、保護リソースセット内のリソースを用いて実行され得るモード３ＵＥによるＳＬ信号送信を保護できる。 Also, for example, in the resource exclusion process from the candidate resource based on the RSSI in S3 of FIG. 10, the user apparatus UE offsets (a positive value) to the value (K) of the RSSI measured for the resource in the protected resource set. The value (K + L1) obtained by adding L1) is used as the RSSI used in the resource exclusion determination. In this case, the resources in the protected resource set are less likely to remain in candidate resources as resources with low interference. Therefore, applying the offset to the resources in the protection resource set can reduce the possibility that the resources in the protection resource set are selected as transmission resources of the SL signal, and use the resources in the protection resource set. It is possible to protect SL signal transmission by mode 3 UE that can be performed.
　上記オフセットを適用する場合でも、他のＵＥが少ない場合等、チャネル状態が十分に良い場合には、保護リソースセット内のリソースがＳＬ送信リソースとして選択される場合はある。 Even when the above offset is applied, there may be a case where a resource in a protected resource set is selected as an SL transmission resource when the channel state is sufficiently good, such as when there are few other UEs.
　なお、上記の例では、保護リソースセット内のリソースにおいてオフセットを適用しているが、保護リソースセット外のリソースにおいてオフセットを適用してもよいし、保護リソースセット内のリソースと保護リソースセット外のリソースの両方においてオフセットを適用してもよい。 In the above example, although the offset is applied to the resources in the protected resource set, the offset may be applied to the resources outside the protected resource set, or the resources in the protected resource set and those outside the protected resource set Offsets may be applied on both of the resources.
　（２）オプションＢ
　オプションＢでは、ユーザ装置ＵＥ（モード４ＵＥ）は、ある条件を満たしたことを検知した場合に、保護リソースセット内のリソースを選択候補として用いることができる。当該条件を満たすことを検知しない場合、ユーザ装置ＵＥ（モード４ＵＥ）は、保護リソースセット内のリソースを選択候補として使用できない。条件の例として、下記の条件１と条件２がある。 (2) Option B
In option B, the user apparatus UE (mode 4 UE) can use resources in the protection resource set as selection candidates when detecting that a certain condition is satisfied. When not detecting that the condition is satisfied, the user apparatus UE (mode 4 UE) can not use resources in the protection resource set as selection candidates. The following conditions 1 and 2 are examples of conditions.
　条件１と条件２においては、ＣＢＲ（Ｃｈａｎｎｅｌ　ｂｕｓｙ　ｒａｔｉｏ）が使用される。ＣＢＲはリソースの混雑度合いを表す値の一例であり、ＣＢＲ以外の量をリソースの混雑度合いを表す値として使用してもよい。ＣＢＲは、例えば非特許文献４において、下記のように定義される値である。 Under conditions 1 and 2, CBR (Channel busy ratio) is used. CBR is an example of a value indicating the degree of congestion of resources, and an amount other than CBR may be used as a value indicating the degree of congestion of resources. CBR is a value defined, for example, in Non-Patent Document 4 as follows.
　「Channel busy ratio (CBR) measured in subframe n is defined as follows:
-　　For PSSCH, the portion of sub-channels in the resource pool whose S-RSSI measured by the UE exceed a (pre-)configured threshold sensed over subframes [n-100, n-1]; 
-　　For PSCCH, in a pool (pre)configured such that PSCCH may be transmitted with its corresponding PSSCH in non-adjacent resource blocks, the portion of the resources of the PSCCH pool whose S-RSSI measured by the UE exceed a (pre-)configured threshold sensed over subframes [n-100, n-1], assuming that the PSCCH pool is composed of resources with a size of two consecutive PRB pairs in the frequency domain.」
　以下、リソースプール（ここではモード４用リソースプールを想定）における、保護リソースセット内のリソースでユーザ装置ＵＥが測定するＣＢＲをＣＢＲ＿１とし、当該リソースプールにおける、保護リソースセット外のリソースにおいてユーザ装置ＵＥが測定するＣＢＲをＣＢＲ＿２とする。 "Channel busy ratio (CBR) measured in subframe n is defined as follows:
-For PSSCH, the portion of sub-channels in the resource pool whose S-RSSI measured by the UE exceeded a (pre-) configured threshold sensed over subframes [n-100, n-1];
-For PSCCH, in a pool (pre) configured such PSCCH may be transmitted with its corresponding PSSCH in non-adjacent resource blocks, the portion of the resources for the PSCCH pool of S-RSSI measured by the UE exceeded a ) Configured threshold sensed over subframes [n-100, n-1], assuming that the PSCCH pool is composed of resources with a size of two consecutive PRB pairs in the frequency domain. "
Hereinafter, in the resource pool (here, the resource pool for mode 4 is assumed), CBR measured by the user apparatus UE in the resource in the protected resource set is CBR_1, and the user apparatus UE in the resource outside the protected resource set in the resource pool The CBR that is measured is CBR_2.
　条件１は、「ＣＢＲ＿２が所定の閾値（Ｔｒ＿２とする）よりも大きく、かつ、ＣＢＲ＿２とＣＢＲ＿１との差（ＣＢＲ＿２－ＣＢＲ＿１）が所定の閾値（Ｔｒ＿ｄ）よりも大きい」ことである。すなわち、条件１を使用する場合、ユーザ装置ＵＥは、センシングにより、「ＣＢＲ＿２＞（又は≧）Ｔｒ＿２、かつ、ＣＢＲ＿２－ＣＢＲ＿１＞（又は≧）Ｔｒ＿ｄ」を満たすことを検知した場合に、保護リソースセット内のリソースを選択候補として用いることができる。また、条件１を使用する場合、ユーザ装置ＵＥは、センシングにより、「ＣＢＲ＿２＞（又は≧）Ｔｒ＿２、かつ、ＣＢＲ＿２－ＣＢＲ＿１＞（又は≧）Ｔｒ＿ｄ」を満たすことを検知しない場合に、保護リソースセット内のリソースを選択候補としない。 Condition 1 is that “CBR_2 is larger than a predetermined threshold (Tr_2), and the difference between CBR_2 and CBR_1 (CBR_2—CBR_1) is larger than a predetermined threshold (Tr_d)”. That is, when using condition 1, when the user apparatus UE detects that "CBR_2> (or)) Tr_2 and CBR_2-CBR_1> (or Tr) Tr_d" is satisfied by sensing, the protection resource set Resources can be used as selection candidates. In addition, when using condition 1, the user equipment UE does not detect that “CBR_2> (or)) Tr_2 and CBR_2−CBR_1> (or Tr) Tr_d” is detected by sensing, the protection resource set Do not select resources within
　条件２は、「ＣＢＲ＿２とＣＢＲ＿１との差（ＣＢＲ＿２－ＣＢＲ＿１）が所定の閾値（Ｔｒ＿ｄ）よりも大きい」ことである。すなわち、条件２を使用する場合、ユーザ装置ＵＥは、センシングにより、「ＣＢＲ＿２－ＣＢＲ＿１＞（又は≧）Ｔｒ＿ｄ」を満たすことを検知した場合に、保護リソースセット内のリソースを選択候補として使用する。また、条件２を使用する場合、ユーザ装置ＵＥは、センシングにより、「ＣＢＲ＿２－ＣＢＲ＿１＞（又は≧）Ｔｒ＿ｄ」を満たすことを検知しない場合に、保護リソースセット内のリソースを選択候補としない。 Condition 2 is that “the difference between CBR_2 and CBR_1 (CBR_2−CBR_1) is larger than a predetermined threshold (Tr_d)”. That is, when using condition 2, the user apparatus UE uses a resource in the protection resource set as a selection candidate when sensing that “CBR_2−CBR_1> (or)) Tr_d” is satisfied by sensing. Moreover, when using condition 2, the user apparatus UE does not set the resource in the protection resource set as a selection candidate when it does not detect that “CBR_2−CBR_1> (or)) Tr_d” is satisfied by sensing.
　いずれの場合でも、リソースプールにおける、保護リソースセット外のリソースは選択候補である。 In any case, resources outside the protected resource set in the resource pool are selection candidates.
　上記の条件１と条件２に関し、条件１では、保護リソースセット外のリソースが混雑している場合に限り、モード４ＵＥは保護リソースセット内のリソースを選択候補とすることができる。一方、条件２では、保護リソースセット外のリソースが混雑していない場合でも、モード４ＵＥは保護リソースセット内のリソースを選択候補とし得る。よって、条件１のほうが、モード３ＵＥをよりよく保護することになる。 With regard to condition 1 and condition 2 described above, under condition 1, the mode 4 UE can set resources in the protection resource set as selection candidates only when resources outside the protection resource set are congested. On the other hand, under condition 2, even if resources outside the protection resource set are not congested, the mode 4 UE can set resources in the protection resource set as selection candidates. Therefore, Condition 1 protects Mode 3 UE better.
　上記の各閾値（Ｔｒ＿２、Ｔｒ＿ｄ）は、例えば、基地局１０からユーザ装置ＵＥにＲＲＣシグナリング等により設定される。また、上記の各閾値（Ｔｒ＿２、Ｔｒ＿ｄ）が、ユーザ装置ＵＥに事前設定されることとしてもよい。 Each of the above thresholds (Tr_2, Tr_d) is set, for example, from the base station 10 to the user apparatus UE by RRC signaling or the like. Further, each of the above-described threshold values (Tr_2, Tr_d) may be preset in the user apparatus UE.
　保護リソースセット内のリソースを選択候補としてよい条件（例：条件１、条件２）を満たさないと判断したユーザ装置ＵＥは、例えば、リソース選択動作において、リソース選択ウィンドウ内のリソースから、まず、保護リソースセット内のリソースを除外し、当該除外後に残ったリソースに対し、図１０のＳ１～Ｓ４のリソース選択動作を実行する。この場合の例を図１４に示す。図１４において、リソース選択ウィンドウにおける、×で示される保護リソースセット内のリソースが最初に除外され、その後、リソース選択動作が実行される。 The user apparatus UE determined not to satisfy the conditions (eg, condition 1, condition 2) for which resources in the protected resource set may be selected as candidates for selection is protected first from the resources in the resource selection window, for example, in the resource selection operation. The resources in the resource set are excluded, and the resource selection operation of S1 to S4 in FIG. 10 is executed on the resources remaining after the exclusion. An example of this case is shown in FIG. In FIG. 14, in the resource selection window, resources in the protected resource set indicated by x are first excluded, and then the resource selection operation is performed.
　ただし、上記は一例であり、保護リソースセット内のリソースを選択候補としてよい条件（例：条件１、条件２）を満たさないと判断したユーザ装置ＵＥは、図１０のＳ１～Ｓ４のリソース選択動作における、任意の段階で、保護リソースセット内のリソースを候補から除外することができる。 However, the above is an example, and the user apparatus UE determined not to satisfy the conditions (example: condition 1, condition 2) for which resources in the protected resource set may be selected candidates is the resource selection operation of S1 to S4 in FIG. At any stage in, resources in the protected resource set can be excluded from candidates.
　（３）オプションＡとオプションＢの組み合わせ
　オプションＡとオプションＢの組み合わせに係る動作例を図１５のフローチャートの手順に沿って説明する。 (3) Combination of Option A and Option B An operation example according to the combination of option A and option B will be described along the procedure of the flowchart of FIG.
　まず、Ｓ２０１において、ユーザ装置ＵＥ（ここではモード４ＵＥ）は、オプションＢの動作により、保護リソースセット内のリソースが選択候補として使用可であるか否かを判断する。 First, in S201, the user apparatus UE (here, mode 4 UE) determines whether or not the resource in the protected resource set is usable as a selection candidate by the operation of option B.
　保護リソースセット内のリソースが使用可である場合（Ｓ２０１のＹｅｓ）、Ｓ２０２において、ユーザ装置ＵＥは、オプションＡのオフセットを使用したリソース選択動作を実行する。 If the resources in the protected resource set are available (Yes in S201), the user apparatus UE performs a resource selection operation using the offset of option A in S202.
　保護リソースセット内のリソースが使用可でない場合（Ｓ２０１のＮｏ）、Ｓ２０３において、ユーザ装置ＵＥは、候補リソース（つまり、リソース選択ウィンドウの中のリソースプールのリソース）から、保護リソースセットを除外する。Ｓ２０４において、ユーザ装置ＵＥは、保護リソースセットを除外した候補リソースに対し、例えば既存のリソース選択動作（例：図１０のＳ１～Ｓ４）を実行する。 If the resources in the protection resource set are not available (No in S201), the user apparatus UE excludes the protection resource set from the candidate resources (that is, the resources of the resource pool in the resource selection window) in S203. In S204, the user apparatus UE executes, for example, an existing resource selection operation (eg, S1 to S4 in FIG. 10) on the candidate resources from which the protection resource set has been excluded.
　なお、Ｓ２０２において、オプションＡのオフセットを用いた動作に代えて、既存のリソース選択動作（例：図１０のＳ１～Ｓ４）を実行することとしてもよい。 In S202, instead of the operation using the offset of option A, an existing resource selection operation (eg, S1 to S4 in FIG. 10) may be executed.
　（実施例２）
　次に、実施例２を説明する。実施例２では、モード３ＵＥとモード４ＵＥとの間の送信ＳＬ信号の衝突に対する対策に関する動作例を説明する。実施例２の動作は、実施例１と組み合わせて実行されてもよいし、実施例１と関わりなく実行されてもよい。以下、実施例２－１、実施例２－２を説明する。実施例２－１と実施例２－２は組み合わせて実行してもよいし、組み合わせずに実行してもよい。 (Example 2)
Next, Example 2 will be described. In the second embodiment, an operation example regarding measures against a collision of transmission SL signals between mode 3 UE and mode 4 UE will be described. The operation of the second embodiment may be performed in combination with the first embodiment or may be performed regardless of the first embodiment. Hereinafter, Example 2-1 and Example 2-2 will be described. The embodiment 2-1 and the embodiment 2-2 may be implemented in combination or may be implemented without combination.
　＜実施例２－１＞
　実施例２－１において、例えば図１６に示すように、モード３ＵＥは、制御情報（ＳＡ）に、予約情報（ＳＬ送信に使用するリソースの時間・周波数情報、リソースの周期等）を含めて送信する（Ｓ３０１）。モード３ＵＥは、基地局１０から割り当てられるリソースを用いてＳＬ送信を行うので、リソース予約を行わないが、実施例２－１では、モード３ＵＥは、例えば、ＳＡに予約リソースの周期を０とした予約情報を含め、当該予約情報を含むＳＡを送信する。 Example 2-1
In Example 2-1, for example, as shown in FIG. 16, mode 3 UE is transmitted including control information (SA) including reservation information (time / frequency information of resource used for SL transmission, resource cycle, etc.) To do (S301). Since mode 3 UE performs SL transmission using resources allocated from the base station 10, no resource reservation is performed. However, in Example 2-1, for example, mode 3 UE sets the cycle of the reservation resource to 0 in SA. It transmits SA including the said reservation information including reservation information.
　モード４ＵＥは、既存のリソース選択動作（例：図１０のＳ１～Ｓ４）に加えて、次の動作を実行する。すなわち、当該ＳＡを受信したモード４ＵＥは、当該予約情報にて示されるリソースを使用したＳＬ信号が、所定の周期でモード３ＵＥから送信されると想定し、当該周期における当該リソースを、ＳＬ送信のリソース選択における候補リソースから除外する。所定の周期は、例えば２０ｍｓ、１００ｍｓであるが、これらに限定されるわけではない。また、所定の周期は、モード４ＵＥに基地局１０から設定されてもよいし、事前設定されてもよい。 Mode 4 UE performs the following operation in addition to the existing resource selection operation (eg, S1 to S4 in FIG. 10). That is, assuming that the SL signal using the resource indicated by the reservation information is transmitted from the mode 3 UE in a predetermined cycle, the mode 4 UE that has received the SA can transmit the resource in the cycle using the SL transmission Exclude from candidate resources in resource selection. The predetermined period is, for example, 20 ms or 100 ms, but is not limited thereto. Also, the predetermined cycle may be set from mode 10 UE from the base station 10 or may be preset.
　なお、モード４ＵＥは、上記のようなモード３ＵＥの送信するＳＡに基づく動作を行うことなく、既存のリソース選択動作（例：図１０のＳ１～Ｓ４）を行うこととしてもよい。既存のリソース選択動作でも、例えば、モード３ＵＥが周期的な送信を行う場合には、当該送信のリソースを除外することが可能である。 Note that the mode 4 UE may perform the existing resource selection operation (eg, S1 to S4 in FIG. 10) without performing the operation based on the transmission SA of the mode 3 UE as described above. Even in the existing resource selection operation, for example, when the mode 3 UE performs periodic transmission, it is possible to exclude the resource of the transmission.
　ここで、上述したモード３ＵＥの送信するＳＡを用いるリソース選択動作をオプション１とし、モード３ＵＥの送信するＳＡを用いない既存のリソース選択動作をオプション２とする。 Here, the resource selection operation using the SA transmitted by the mode 3 UE described above is option 1 and the existing resource selection operation not using the SA transmitted by the mode 3 UE is option 2.
　実施例２－１においては、モード４ＵＥは、例えば、リソース選択ウィンドウにおける保護リソースセット内のリソースに対し、オプション１の動作を実行し、リソース選択ウィンドウにおける保護リソースセット外のリソースに対しオプション２の動作を実行してもよい。つまり、モード４ＵＥは、保護リソースセット内のリソースと、保護リソースセット外のリソースとで、異なるリソース選択動作を実行してもよい。 In Example 2-1, the mode 4 UE performs, for example, the operation of Option 1 on resources in the protected resource set in the resource selection window, and the option 2 on the resources outside the protected resource set in the resource selection window. An action may be performed. That is, mode 4 UE may perform different resource selection operations for resources within the protected resource set and resources outside the protected resource set.
　＜実施例２－２＞
　実施例２－２においては、図１７に示すように、ユーザ装置ＵＥ１（モード４ＵＥ、あるいはモード３ＵＥ）は、センシングにより、リソースプール（例：モード４用リソースプール）におけるリソースの混雑度合を測定し、混雑度合の値をチャネル状態情報（センシング報告と呼んでもよい）として基地局１０に送信する（Ｓ４０１）。基地局１０は、チャネル状態情報に基づき、例えば、リソースプールから混雑度の高いリソースを除いたリソースセットから選択したリソースを、ユーザ装置ＵＥ２（モード３ＵＥ）に割り当てる（Ｓ４０２）。 Example 2-2
In Example 2-2, as shown in FIG. 17, the user apparatus UE1 (mode 4 UE or mode 3 UE) measures the congestion degree of resources in the resource pool (eg, resource pool for mode 4) by sensing. The value of the congestion degree is transmitted to the base station 10 as channel state information (which may be called a sensing report) (S401). The base station 10 allocates, for example, a resource selected from a resource set obtained by removing a resource with a high degree of congestion from the resource pool, to the user apparatus UE2 (mode 3 UE) based on the channel state information (S402).
　なお、図１７では、チャネル状態情報を送信する「ユーザ装置ＵＥ１」、リソース割り当てを受ける「ユーザ装置ＵＥ２」として、１つずつのユーザ装置を示しているが、これは図示の便宜のためであり、実際には、ユーザ装置ＵＥ１として複数のユーザ装置ＵＥが存在し得、ユーザ装置ＵＥ２として複数のユーザ装置ＵＥが存在し得る。 In FIG. 17, one user apparatus is shown as “user apparatus UE1” for transmitting channel state information and “user apparatus UE2” for receiving resource allocation, but this is for convenience of illustration. In fact, a plurality of user apparatuses UE may exist as the user apparatus UE1, and a plurality of user apparatuses UE may exist as the user apparatus UE2.
　実施例２－２では、ユーザ装置ＵＥ１は、ある条件を満たしたことを検知した場合に、チャネル状態情報を送信し、当該条件を満たしたことを検知しない場合に、チャネル状態情報を送信しないこととしてもよい。このような判断を行うケースの例として、以下に、ケース１とケース２を説明する。 In Example 2-2, when detecting that a certain condition is satisfied, the user apparatus UE1 transmits channel state information, and when not detecting that the condition is satisfied, the user apparatus UE1 does not transmit channel state information. It may be Cases 1 and 2 will be described below as an example of the case where such a determination is made.
　以下の説明において、混雑度合を示す指標の一例として前述したＣＢＲを使用する。また、リソースプール（ここではモード４用リソースプールを想定）における、保護リソースセット内のリソースでユーザ装置ＵＥ１が測定するＣＢＲをＣＢＲ＿１とし、当該リソースプールにおける、保護リソースセット外のリソースにおいてユーザ装置ＵＥ１が測定するＣＢＲをＣＢＲ＿２とする。 In the following description, the CBR described above is used as an example of an index indicating the degree of congestion. Further, CBR measured by the user apparatus UE1 in a resource in a protected resource set in a resource pool (here, a resource pool for mode 4 is assumed) is CBR_1, and the user apparatus UE1 in a resource outside the protected resource set in the resource pool. The CBR that is measured is CBR_2.
　（１）ケース１
　ケース１では、ユーザ装置ＵＥ１は、保護リソースセット内のリソースが混雑したことを検知し、及び／又は、保護リソースセット外のリソースが混雑したことを検知し、更に、保護リソースセット内のリソースの混雑度合のほうが保護リソースセット外のリソースの混雑度合よりも高いことを検知した場合に、チャネル状態情報の基地局１０への送信を行う。この場合、例えば、保護リソースセット外のリソースが基地局１０からユーザ装置ＵＥ２に割り当てられる。 (1) Case 1
In Case 1, the user apparatus UE1 detects that the resources in the protected resource set are congested, and / or detects that the resources outside the protected resource set are congested, and further, detects that the resources in the protected resource set are congested. When it is detected that the congestion degree is higher than the congestion degree of resources outside the protection resource set, the channel state information is transmitted to the base station 10. In this case, for example, resources outside the protection resource set are allocated from the base station 10 to the user apparatus UE2.
　すなわち、Ｔｒ＿１、Ｔｒ＿２、Ｔｒ＿３、Ｔｒ＿ｄをそれぞれ閾値とすると、ユーザ装置ＵＥ１は、センシングにより、「ＣＢＲ＿１＞（又は≧）Ｔｒ＿１、及び／又は、ＣＢＲ＿２＞（又は≧）Ｔｒ＿２、かつ、ＣＢＲ＿１‐ＣＢＲ＿２＞Ｔｒ＿３（又はＴｒ＿ｄ）」が満たされることを検知した場合に、チャネル状態情報を基地局１０に報告する。当該チャネル状態情報には、例えば、保護リソースセット外のリソースについての混雑度合の情報と、保護リソースセット内のリソースについての混雑度合の情報が含まれる。 That is, assuming that Tr_1, Tr_2, Tr_3 and Tr_d are threshold values, the user apparatus UE1 detects “CBR_1> (or)) Tr_1 and / or CBR_2> (or)) Tr_2, and CBR_1-CBR_2> by sensing. Channel state information is reported to the base station 10 when it is detected that “Tr_3 (or Tr_d)” is satisfied. The channel state information includes, for example, information on the degree of congestion for resources outside the protected resource set and information on the degree of congestion for resources in the protected resource set.
　（２）ケース２
　ケース２では、ユーザ装置ＵＥ１は、保護リソースセット内のリソースが混雑したことを検知し、及び／又は、保護リソースセット外のリソースが混雑したことを検知し、更に、保護リソースセット外のリソースの混雑度合のほうが保護リソースセット内のリソースの混雑度合よりも高いことを検知した場合に、チャネル状態情報の基地局１０への送信を行う。この場合、例えば、保護リソースセット内のリソースが基地局１０からユーザ装置ＵＥ２に割り当てられる。 (2) Case 2
In Case 2, the user apparatus UE1 detects congestion of resources in the protection resource set and / or detects congestion of resources outside the protection resource set, and further, detects the congestion of resources outside the protection resource set. When it is detected that the congestion degree is higher than the congestion degree of the resources in the protection resource set, the channel state information is transmitted to the base station 10. In this case, for example, resources in the protection resource set are allocated from the base station 10 to the user apparatus UE2.
　すなわち、Ｔｒ＿１、Ｔｒ＿２、Ｔｒ＿４、Ｔｒ＿ｄをそれぞれ閾値とすると、ユーザ装置ＵＥ１は、センシングにより、「ＣＢＲ＿１＞（又は≧）Ｔｒ＿１、及び／又は、ＣＢＲ＿２＞（又は≧）Ｔｒ＿２、かつ、ＣＢＲ＿２‐ＣＢＲ＿１＞Ｔｒ＿４（又はＴｒ＿ｄ）」が満たされることを検知した場合に、チャネル状態情報を基地局１０に報告する。当該チャネル状態情報には、例えば、保護リソースセット外のリソースについての混雑度合の情報と、保護リソースセット内のリソースについての混雑度合の情報が含まれる。 That is, assuming that Tr_1, Tr_2, Tr_4, and Tr_d are threshold values, the user apparatus UE1 detects “CBR_1> (or ≧) Tr_1, and / or CBR_2> (or)) Tr_2, and CBR_2-CBR_1> by sensing. The channel state information is reported to the base station 10 when it is detected that “Tr_4 (or Tr_d)” is satisfied. The channel state information includes, for example, information on the degree of congestion for resources outside the protected resource set and information on the degree of congestion for resources in the protected resource set.
　ケース１とケース２のいずれの場合にも、条件を満たしたことが検知されない場合には、ユーザ装置ＵＥ１は、チャネル状態情報を基地局１０に送信しない。 In any case of Case 1 and Case 2, when it is not detected that the condition is satisfied, the user apparatus UE1 does not transmit the channel state information to the base station 10.
　なお、上記のように、ユーザ装置ＵＥ１がセンシングに基づいてチャネル状態情報を基地局１０に送信するか否かを判断することに代えて、基地局１０が、ユーザ装置ＵＥ１に対して、チャネル状態情報を基地局１０に送信するか否かを指示してもよい。この指示は、例えば、ＵＬグラントのＤＣＩ（ＤＣＩフォーマット０／４）における１ビットを使用して行うことができる。 As described above, instead of determining whether the user apparatus UE1 transmits the channel state information to the base station 10 based on sensing, the base station 10 transmits the channel state to the user apparatus UE1. It may indicate whether to transmit information to the base station 10 or not. This indication can be performed, for example, using 1 bit in DCI (DCI format 0/4) of UL grant.
　（実施例３）
　次に、実施例３を説明する。実施例３では、基地局１０から通知されるモード３ＵＥに対するリソース割り当ての内容が、当該モード３ＵＥ以外のユーザ装置ＵＥにも通知される。これにより、モード４ＵＥは、モード３ＵＥに割り当てられるＳＬ送信のためのリソースを把握でき、リソース選択において、モード３ＵＥが使用するリソースを候補リソースから除外することができる。実施例３では、以下のオプション１とオプション２を説明する。 (Example 3)
Next, Example 3 will be described. In the third embodiment, the contents of resource allocation for mode 3 UE notified from the base station 10 are also notified to user apparatuses UE other than the mode 3 UE. Thereby, mode 4 UE can grasp the resource for SL transmission allocated to mode 3 UE, and can exclude the resource used by mode 3 UE from candidate resources in resource selection. In Example 3, the following Option 1 and Option 2 will be described.
　（１）オプション１
　オプション１では、図１８Ａに示すように、基地局１０から送信されるモード３のＳＬリソース割り当てのためのＤＣＩは、リソース割り当て情報（ｒｅｓｏｕｒｃｅ　ａｌｌｏｃａｔｉｏｎ）、ＵＥ　ＩＤ、ＣＲＣを有する。ＵＥ　ＩＤは、リソース割り当ての対象となるモード３ＵＥを識別するＩＤである。モード３ＵＥは、ＤＣＩから自分のＵＥ　ＩＤを検出することで、当該ＤＣＩが自身に対するリソース割り当てのＤＣＩであることを認識する。当該ＵＥ　ＩＤは、特定のＩＤに限定されないが、例えば、ＲＮＴＩ、ＳＬ－ＢＳＲ（Sidelink Buffer Status Report）の中に含めたＩＤ、あるいは、上位レイヤシグナリングで設定されたＩＤである。 (1) Option 1
In Option 1, as shown in FIG. 18A, DCI for SL resource allocation in mode 3 transmitted from the base station 10 has resource allocation information (resource allocation), UE ID, and CRC. The UE ID is an ID for identifying a mode 3 UE to be a target of resource allocation. Mode 3 UE recognizes that the DCI is a DCI of resource allocation to itself by detecting its own UE ID from the DCI. The UE ID is not limited to a specific ID, but is, for example, an RNTI, an ID included in SL-BSR (Sidelink Buffer Status Report), or an ID set by higher layer signaling.
　ＣＲＣは、ペイロード及びＵＥ－ＩＤ（あるいはペイロード）に対するＣＲＣである。ＣＲＣには、共通サーチスペース（セルで共通のサーチスペースでもよいし、あるグループのＵＥで共通のサーチスペースでもよい）での検出を可能とするＲＮＴＩでマスクがされる。当該マスクに使用されるＲＮＴＩは、例えば、上位レイヤシグナリングで基地局１０からユーザ装置ＵＥに設定されてもよいし、システム情報（ＳＩＢ）で基地局１０からユーザ装置ＵＥに設定されてもよい。 The CRC is a CRC for the payload and the UE-ID (or payload). The CRC is masked with an RNTI that enables detection in a common search space (which may be a common search space in a cell or a common search space in a certain group of UEs). The RNTI used for the mask may be set from the base station 10 to the user apparatus UE by higher layer signaling, for example, or may be set from the base station 10 to the user apparatus UE by system information (SIB).
　すなわち、基地局１０は、図１８Ａに示すＤＣＩを、下り制御チャネルにおける共通サーチスペースにマッピングして送信する。当該ＤＣＩを受信するユーザ装置ＵＥは、共通サーチスペースにおいて、上記ＲＮＴＩを用いてＤＣＩの復号を行う。 That is, the base station 10 maps the DCI shown in FIG. 18A to the common search space in the downlink control channel and transmits it. The user apparatus UE that receives the DCI performs DCI decoding using the RNTI in the common search space.
　ＤＣＩを復号したユーザ装置ＵＥは、ＤＣＩに含まれるＵＥ　ＩＤが自身のＵＥ　ＩＤであれば、このＤＣＩに示されるリソースを用いてＳＬ信号の送信を行う。また、ＤＣＩを復号したユーザ装置ＵＥは、ＤＣＩに含まれるＵＥ　ＩＤが自身のＵＥ　ＩＤでなければ、当該ＤＣＩで示されるリソースは他のユーザ装置ＵＥによりＳＬ信号送信に使用されることを把握し、例えば、自身のＳＬのリソース選択において、当該リソースを候補リソースから除外する動作を行うことができる。 If the UE ID included in the DCI is the UE ID of the user apparatus UE that has decoded the DCI, the user apparatus UE transmits an SL signal using the resource indicated in this DCI. Also, if the UE apparatus that has decoded the DCI is not the UE ID contained in the DCI is its own UE ID, the user apparatus UE recognizes that the resource indicated by the DCI is used for SL signal transmission by another user apparatus UE. For example, in resource selection of its own SL, an operation of excluding the resource from candidate resources can be performed.
　（２）オプション２
　オプション２では、基地局１０は、モード３ＵＥに対し、当該モード３ＵＥのＳＬリソース割り当てのためのＤＣＩ（ＤＣＩ＿Ａと呼ぶ）に加えて、図１８Ｂに示すＤＣＩ（ＤＣＩ＿Ｂと呼ぶ）を送信する。ＤＣＩ＿Ａは、例えば、ＵＥ個別のＲＮＴＩによりマスクされたＣＲＣを有し、ＵＥ個別のサーチスペースで送信される。なお、ＤＣＩ＿Ａを共通サーチスペースで送信することとしてもよい。 (2) Option 2
In option 2, the base station 10 transmits DCI (referred to as DCI_B) shown in FIG. 18B to the mode 3 UE in addition to DCI (referred to as DCI_A) for SL resource allocation of the mode 3 UE. The DCI_A has, for example, a CRC masked by the UE-specific RNTI and is transmitted in the UE-specific search space. The DCI_A may be transmitted in the common search space.
　図１８Ｂに示すＤＣＩ＿Ｂは、ＤＣＩ＿Ａによりモード３ＵＥに割り当てるリソースを示すリソース割り当て情報（ｒｅｓｏｕｒｃｅ　ａｌｌｏｃａｔｉｏｎ）、及びＣＲＣを有する。ＣＲＣは、ペイロードに対するＣＲＣである。ＣＲＣには、共通サーチスペース（セルで共通のサーチスペースでもよいし、あるグループのＵＥで共通のサーチスペースでもよい）での検出を可能とするＲＮＴＩでマスクがされる。当該マスクに使用されるＲＮＴＩは、例えば、上位レイヤシグナリングで基地局１０からユーザ装置ＵＥに設定されてもよいし、システム情報（ＳＩＢ）で基地局１０からユーザ装置ＵＥに設定されてもよい。 The DCI_B illustrated in FIG. 18B includes resource allocation information (resource allocation) indicating a resource allocated to the mode 3 UE by the DCI_A, and a CRC. CRC is the CRC for the payload. The CRC is masked with an RNTI that enables detection in a common search space (which may be a common search space in a cell or a common search space in a certain group of UEs). The RNTI used for the mask may be set from the base station 10 to the user apparatus UE by higher layer signaling, for example, or may be set from the base station 10 to the user apparatus UE by system information (SIB).
　すなわち、基地局１０は、あるモード３ＵＥに対してリソース割り当てを行う際に、ＤＣＩ＿ＡをＵＥ個別サーチスペースにマッピングして送信するとともに、ＤＣＩ＿Ｂを共通サーチスペースにマッピングして送信する。 That is, when performing resource allocation to a certain mode 3 UE, the base station 10 maps DCI_A to the UE-specific search space and transmits it, and maps DCI_B to the common search space and transmits it.
　ＵＥ個別サーチスペースにおいてＤＣＩ＿Ａを復号できたユーザ装置ＵＥは、ＤＣＩ＿Ａで指定されたリソースを用いてＳＬ信号を送信する。また、共通サーチスペースにおいて、ＤＣＩ＿Ｂを復号したユーザ装置ＵＥは、ＤＣＩ＿Ｂで示されるリソースは他のユーザ装置ＵＥによりＳＬ送信に使用されることを把握し、例えば、自身のＳＬのリソース選択において、当該リソースを候補リソースから除外する動作を行うことができる。 The user apparatus UE that has successfully decoded DCI_A in the UE-specific search space transmits an SL signal using the resource specified by DCI_A. Also, in the common search space, the user apparatus UE that has decoded DCI_B recognizes that the resource indicated by DCI_B is used for SL transmission by another user apparatus UE, for example, in resource selection of its own SL An action can be taken to exclude resources from candidate resources.
　（装置構成）
　次に、これまでに説明した処理動作を実行するユーザ装置ＵＥ及び基地局１０の機能構成例を説明する。ユーザ装置ＵＥ及び基地局１０は、本実施の形態で説明した全ての機能を備えている。ただし、ユーザ装置ＵＥ及び基地局１０は、本実施の形態で説明した全ての機能のうちの一部のみの機能を備えてもよい。 (Device configuration)
Next, a functional configuration example of the user apparatus UE and the base station 10 that execute the processing operations described above will be described. The user apparatus UE and the base station 10 have all the functions described in the present embodiment. However, the user apparatus UE and the base station 10 may be provided with only a part of all the functions described in the present embodiment.
　＜ユーザ装置＞
　図１９は、ユーザ装置ＵＥの機能構成の一例を示す図である。図１９に示すように、ユーザ装置ＵＥは、信号送信部１０１と、信号受信部１０２と、設定情報管理部１０３と、リソース選択部１０４と、チャネル状態報告部１０５を有する。図１９に示す機能構成は一例に過ぎない。本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。なお、信号送信部１０１を送信機と称し、信号受信部１０２を受信機と称してもよい。 <User device>
FIG. 19 is a diagram illustrating an example of a functional configuration of the user apparatus UE. As shown in FIG. 19, the user apparatus UE has a signal transmission unit 101, a signal reception unit 102, a setting information management unit 103, a resource selection unit 104, and a channel state report unit 105. The functional configuration shown in FIG. 19 is merely an example. As long as the operation according to the present embodiment can be performed, the function classification and the name of the functional unit may be arbitrary. The signal transmission unit 101 may be referred to as a transmitter, and the signal reception unit 102 may be referred to as a receiver.
　信号送信部１０１は、送信データから送信を作成し、当該送信信号を無線で送信する。信号受信部１０２は、各種の信号を無線受信し、受信した物理レイヤの信号からより上位のレイヤの信号を取得する。また、信号受信部１０２は、受信電力を測定する機能を含む。設定情報管理部１０３は、信号受信部１０２により基地局１０から受信した各種の設定情報、及び、予め設定される設定情報を格納する。設定情報の例としてはリソースプールの情報、保護リソースセットの情報等がある。 The signal transmission unit 101 creates a transmission from transmission data, and wirelessly transmits the transmission signal. The signal reception unit 102 wirelessly receives various signals, and acquires higher layer signals from the received physical layer signals. Further, the signal receiving unit 102 includes a function of measuring the received power. The setting information management unit 103 stores various setting information received from the base station 10 by the signal receiving unit 102 and setting information set in advance. Examples of setting information include information on resource pools, information on protected resource sets, and the like.
　リソース選択部１０４は、本実施の形態で説明したリソース選択に関わる処理を実行する。なお、リソース選択部１０４が、受信電力測定を含むセンシング機能を備えてもよい。また、チャネル状態報告部１０５は、実施例２で説明したチャネル状態報告処理（報告するかどうかの判定処理を含む）を実行する。 The resource selection unit 104 executes the process related to resource selection described in the present embodiment. Note that the resource selection unit 104 may have a sensing function including received power measurement. Also, the channel state reporting unit 105 executes the channel state reporting process (including the process of determining whether to report) described in the second embodiment.
　また、例えば、設定情報管理部１０３は、リソースプールにおける所定のリソースセットの設定情報を格納するように構成され、リソース選択部１０４は、サイドリンク送信用のリソースとして、前記所定のリソースセット外のリソースを、前記所定のリソースセット内のリソースよりも優先して選択するように構成される。 Also, for example, the setting information management unit 103 is configured to store setting information of a predetermined resource set in the resource pool, and the resource selection unit 104 is configured to be outside the predetermined resource set as a resource for side link transmission. It is configured to select resources in preference to resources in the predetermined resource set.
　前記リソース選択部１０４は、例えば、前記所定のリソースセット内のリソースに対する受信電力の測定結果にオフセットを適用することによりリソース選択を実行する。また、前記リソース選択部１０４は、前記所定のリソースセット内における混雑度合と、前記所定のリソースセット外における混雑度合とに基づいて、前記所定のリソースセット内のリソースを、サイドリンク送信用のリソースの候補として使用するか否かを決定することとしてもよい。 The resource selection unit 104 performs resource selection, for example, by applying an offset to the measurement result of received power for resources in the predetermined resource set. Further, the resource selection unit 104 is configured to transmit resources in the predetermined resource set as resources for side link transmission based on the congestion degree in the predetermined resource set and the congestion degree outside the predetermined resource set. It may be determined whether to use as a candidate for
　また、前記リソース選択部１０４は、例えば、前記所定のリソースセット内のリソースを、サイドリンク送信用のリソースの候補として使用しない場合において、リソース選択ウィンドウ内のリソースプールから、前記所定のリソースセット内のリソースを除外したリソースを、サイドリンク送信用のリソースの候補として使用する。また、前記リソース選択部１０４は、基地局から受信する制御情報に基づいて、他のユーザ装置に対して割り当てられるリソースを、サイドリンク送信用のリソースの候補から除外することとしてもよい。 In addition, in the case where the resource selection unit 104 does not use a resource in the predetermined resource set as a resource candidate for side link transmission, for example, within the predetermined resource set from the resource pool in the resource selection window. The resource excluding the resource of is used as a candidate of a resource for side link transmission. Further, the resource selection unit 104 may exclude resources allocated to other user apparatuses from candidates for side link transmission based on control information received from a base station.
　＜基地局１０＞
　図２０は、基地局１０の機能構成の一例を示す図である。図２０に示すように、基地局１０は、信号送信部２０１と、信号受信部２０２と、設定情報管理部２０３と、リソース割り当て部２０４を有する。図２０に示す機能構成は一例に過ぎない。本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。 <Base station 10>
FIG. 20 is a diagram showing an example of a functional configuration of the base station 10. As shown in FIG. As shown in FIG. 20, the base station 10 includes a signal transmission unit 201, a signal reception unit 202, a setting information management unit 203, and a resource assignment unit 204. The functional configuration shown in FIG. 20 is merely an example. As long as the operation according to the present embodiment can be performed, the function classification and the name of the functional unit may be arbitrary.
　信号送信部２０１は、ユーザ装置ＵＥ側に送信する信号を生成し、当該信号を無線で送信する機能を含む。信号受信部２０２は、ユーザ装置ＵＥから送信された各種の信号を受信し、受信した信号から、例えばより上位のレイヤの情報を取得する機能を含む。また、信号送信部２０１は、実施例３で説明したＤＣＩを送信する機能を含む。 The signal transmission unit 201 includes a function of generating a signal to be transmitted to the user apparatus UE side and wirelessly transmitting the signal. The signal receiving unit 202 includes a function of receiving various signals transmitted from the user apparatus UE and acquiring, for example, higher layer information from the received signals. Further, the signal transmission unit 201 includes the function of transmitting the DCI described in the third embodiment.
　設定情報管理部２０３は、ユーザ装置ＵＥに送信する各種の設定情報、ユーザ装置ＵＥから受信する各種の設定情報、及び、予め設定される設定情報を格納する。設定情報の例としてはリソースプールの情報、保護リソースセットの情報等がある。リソース割り当て部２０４は、例えば、モード３ＵＥに対してリソースを割り当てる処理を行う。 The setting information management unit 203 stores various setting information to be transmitted to the user apparatus UE, various setting information received from the user apparatus UE, and setting information set in advance. Examples of setting information include information on resource pools, information on protected resource sets, and the like. The resource assignment unit 204 performs, for example, processing for assigning resources to mode 3 UEs.
　＜ハードウェア構成＞
　上記実施の形態の説明に用いたブロック図（図１９～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／又はソフトウェア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手段は特に限定されない。すなわち、各機能ブロックは、物理的及び／又は論理的に複数要素が結合した１つの装置により実現されてもよいし、物理的及び／又は論理的に分離した２つ以上の装置を直接的及び／又は間接的に（例えば、有線及び／又は無線）で接続し、これら複数の装置により実現されてもよい。 <Hardware configuration>
The block diagrams (FIGS. 19 to 20) used in the description of the above embodiment show blocks in functional units. These functional blocks (components) are realized by any combination of hardware and / or software. Moreover, the implementation means of each functional block is not particularly limited. That is, each functional block may be realized by one device physically and / or logically connected to a plurality of elements, or directly and two or more physically and / or logically separated devices. And / or indirectly (for example, wired and / or wirelessly) connected, and may be realized by the plurality of devices.
　また、例えば、本発明の一実施の形態におけるユーザ装置ＵＥと基地局１０はいずれも、本実施の形態に係る処理を行うコンピュータとして機能してもよい。図２１は、本実施の形態に係るユーザ装置ＵＥと基地局１０のハードウェア構成の一例を示す図である。上述のユーザ装置ＵＥと基地局１０はそれぞれ、物理的には、プロセッサ１００１、メモリ１００２、ストレージ１００３、通信装置１００４、入力装置１００５、出力装置１００６、バス１００７などを含むコンピュータ装置として構成されてもよい。 Also, for example, both the user apparatus UE and the base station 10 in an embodiment of the present invention may function as a computer that performs the process according to the present embodiment. FIG. 21 is a diagram showing an example of the hardware configuration of the user apparatus UE and the base station 10 according to the present embodiment. Even if the above-mentioned user apparatus UE and base station 10 are physically configured as a computer apparatus including processor 1001, memory 1002, storage 1003, communication apparatus 1004, input apparatus 1005, output apparatus 1006, bus 1007, etc. Good.
　なお、以下の説明では、「装置」という文言は、回路、デバイス、ユニットなどに読み替えることができる。ユーザ装置ＵＥと基地局１０のハードウェア構成は、図に示した１００１～１００６で示される各装置を１つ又は複数含むように構成されてもよいし、一部の装置を含まずに構成されてもよい。 In the following description, the term "device" can be read as a circuit, a device, a unit, or the like. The hardware configurations of the user apparatus UE and the base station 10 may be configured to include one or more devices indicated by 1001 to 1006 shown in the figure, or may be configured without including some devices. May be
　ユーザ装置ＵＥと基地局１０における各機能は、プロセッサ１００１、メモリ１００２などのハードウェア上に所定のソフトウェア（プログラム）を読み込ませることで、プロセッサ１００１が演算を行い、通信装置１００４による通信、メモリ１００２及びストレージ１００３におけるデータの読み出し及び／又は書き込みを制御することで実現される。 Each function in the user apparatus UE and the base station 10 causes the processor 1001 to perform an operation by reading predetermined software (program) on hardware such as the processor 1001, the memory 1002, and the like, and communication by the communication apparatus 1004; And by controlling the reading and / or writing of data in the storage 1003.
　プロセッサ１００１は、例えば、オペレーティングシステムを動作させてコンピュータ全体を制御する。プロセッサ１００１は、周辺装置とのインターフェース、制御装置、演算装置、レジスタなどを含む中央処理装置（ＣＰＵ：Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）で構成されてもよい。 The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
　また、プロセッサ１００１は、プログラム（プログラムコード）、ソフトウェアモジュール又はデータを、ストレージ１００３及び／又は通信装置１００４からメモリ１００２に読み出し、これらに従って各種の処理を実行する。プログラムとしては、上述の実施の形態で説明した動作の少なくとも一部をコンピュータに実行させるプログラムが用いられる。例えば、図１９に示したユーザ装置ＵＥの信号送信部１０１、信号受信部１０２、設定情報管理部１０３、リソース選択部１０４、チャネル状態報告部１０５は、メモリ１００２に格納され、プロセッサ１００１で動作する制御プログラムによって実現されてもよい。また、例えば、図２０に示した基地局１０の信号送信部２０１と、信号受信部２０２と、設定情報管理部２０３、リソース割り当て部２０４は、メモリ１００２に格納され、プロセッサ１００１で動作する制御プログラムによって実現されてもよい。上述の各種処理は、１つのプロセッサ１００１で実行される旨を説明してきたが、２以上のプロセッサ１００１により同時又は逐次に実行されてもよい。プロセッサ１００１は、１以上のチップで実装されてもよい。なお、プログラムは、電気通信回線を介してネットワークから送信されても良い。 Also, the processor 1001 reads a program (program code), a software module or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these. As a program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the signal transmission unit 101, the signal reception unit 102, the setting information management unit 103, the resource selection unit 104, and the channel state report unit 105 of the user apparatus UE illustrated in FIG. 19 are stored in the memory 1002 and operate in the processor 1001. It may be realized by a control program. Also, for example, the control program stored in the memory 1002 of the signal transmission unit 201, the signal reception unit 202, the setting information management unit 203, and the resource assignment unit 204 of the base station 10 shown in FIG. It may be realized by The various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.
　メモリ１００２は、コンピュータ読み取り可能な記録媒体であり、例えば、ＲＯＭ（Ｒｅａｄ　Ｏｎｌｙ　Ｍｅｍｏｒｙ）、ＥＰＲＯＭ（Ｅｒａｓａｂｌｅ　Ｐｒｏｇｒａｍｍａｂｌｅ　ＲＯＭ）、ＥＥＰＲＯＭ（Ｅｌｅｃｔｒｉｃａｌｌｙ　Ｅｒａｓａｂｌｅ　Ｐｒｏｇｒａｍｍａｂｌｅ　ＲＯＭ）、ＲＡＭ（Ｒａｎｄｏｍ　Ａｃｃｅｓｓ　Ｍｅｍｏｒｙ）などの少なくとも１つで構成されてもよい。メモリ１００２は、レジスタ、キャッシュ、メインメモリ（主記憶装置）などと呼ばれてもよい。メモリ１００２は、本発明の一実施の形態に係る処理を実施するために実行可能なプログラム（プログラムコード）、ソフトウェアモジュールなどを保存することができる。 The memory 1002 is a computer readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be done. The memory 1002 may be called a register, a cache, a main memory (main storage device) or the like. The memory 1002 can store a program (program code), a software module, and the like that can be executed to execute the process according to the embodiment of the present invention.
　ストレージ１００３は、コンピュータ読み取り可能な記録媒体であり、例えば、ＣＤ－ＲＯＭ（Ｃｏｍｐａｃｔ　Ｄｉｓｃ　ＲＯＭ）などの光ディスク、ハードディスクドライブ、フレキシブルディスク、光磁気ディスク（例えば、コンパクトディスク、デジタル多用途ディスク、Ｂｌｕ－ｒａｙ（登録商標）ディスク）、スマートカード、フラッシュメモリ（例えば、カード、スティック、キードライブ）、フロッピー（登録商標）ディスク、磁気ストリップなどの少なくとも１つで構成されてもよい。ストレージ１００３は、補助記憶装置と呼ばれてもよい。上述の記憶媒体は、例えば、メモリ１００２及び／又はストレージ１００３を含むデータベース、サーバその他の適切な媒体であってもよい。 The storage 1003 is a computer readable recording medium, and for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray A (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like may be used. The storage 1003 may be called an auxiliary storage device. The above-mentioned storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server or any other suitable medium.
　通信装置１００４は、有線及び／又は無線ネットワークを介してコンピュータ間の通信を行うためのハードウェア（送受信デバイス）であり、例えばネットワークデバイス、ネットワークコントローラ、ネットワークカード、通信モジュールなどともいう。例えば、ユーザ装置１０の信号送信部１０１及び信号受信部１０２は、通信装置１００４で実現されてもよい。また、基地局１０の信号送信部２０１及び信号受信部２０２は、通信装置１００４で実現されてもよい。 The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the signal transmission unit 101 and the signal reception unit 102 of the user device 10 may be realized by the communication device 1004. Also, the signal transmission unit 201 and the signal reception unit 202 of the base station 10 may be realized by the communication device 1004.
　入力装置１００５は、外部からの入力を受け付ける入力デバイス（例えば、キーボード、マウス、マイクロフォン、スイッチ、ボタン、センサなど）である。出力装置１００６は、外部への出力を実施する出力デバイス（例えば、ディスプレイ、スピーカー、ＬＥＤランプなど）である。なお、入力装置１００５及び出力装置１００６は、一体となった構成（例えば、タッチパネル）であってもよい。 The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) 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 performs output to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
　また、プロセッサ１００１及びメモリ１００２などの各装置は、情報を通信するためのバス１００７で接続される。バス１００７は、単一のバスで構成されてもよいし、装置間で異なるバスで構成されてもよい。 Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured by a single bus or may be configured by different buses among the devices.
　また、ユーザ装置ＵＥと基地局１０はそれぞれ、マイクロプロセッサ、デジタル信号プロセッサ（ＤＳＰ：Ｄｉｇｉｔａｌ　Ｓｉｇｎａｌ　Ｐｒｏｃｅｓｓｏｒ）、ＡＳＩＣ（Ａｐｐｌｉｃａｔｉｏｎ　Ｓｐｅｃｉｆｉｃ　Ｉｎｔｅｇｒａｔｅｄ　Ｃｉｒｃｕｉｔ）、ＰＬＤ（Ｐｒｏｇｒａｍｍａｂｌｅ　Ｌｏｇｉｃ　Ｄｅｖｉｃｅ）、ＦＰＧＡ（Ｆｉｅｌｄ　Ｐｒｏｇｒａｍｍａｂｌｅ　Ｇａｔｅ　Ａｒｒａｙ）などのハードウェアを含んで構成されてもよく、当該ハードウェアにより、各機能ブロックの一部又は全てが実現されてもよい。例えば、プロセッサ１００１は、これらのハードウェアの少なくとも１つで実装されてもよい。 Also, each of the user apparatus UE and the base station 10 includes a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured to include hardware, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.
　（実施の形態のまとめ）
　以上、説明したように、本実施の形態によれば、リソースプールからリソースを選択し、選択したリソースを使用してサイドリンク送信を行うユーザ装置であって、前記リソースプールにおける所定のリソースセットの設定情報を格納する設定情報管理部と、サイドリンク送信用のリソースとして、前記所定のリソースセット外のリソースを、前記所定のリソースセット内のリソースよりも優先して選択するリソース選択部とを備えるユーザ装置が提供される。 (Summary of the embodiment)
As described above, according to the present embodiment, a user apparatus that selects a resource from a resource pool and performs side link transmission using the selected resource, is a user apparatus of a predetermined resource set in the resource pool. A configuration information management unit storing configuration information, and a resource selection unit configured to select a resource outside the predetermined resource set as a resource for side link transmission in preference to a resource in the predetermined resource set A user device is provided.
　上記の構成により、複数のユーザ装置がＳＬ送信を行う無線通信システムにおいて、ＳＬ信号の衝突を低減することを可能とする技術が提供される。 The above configuration provides a technology that makes it possible to reduce the collision of SL signals in a wireless communication system in which a plurality of user apparatuses perform SL transmission.
　前記リソース選択部は、例えば、前記所定のリソースセット内のリソースに対する受信電力の測定結果にオフセットを適用することによりリソース選択を実行する。この構成により、前記所定のリソースセット内のリソースが選択される可能性を下げることができる。 The resource selection unit performs resource selection, for example, by applying an offset to a measurement result of received power for resources in the predetermined resource set. This configuration can reduce the possibility of selecting a resource in the predetermined resource set.
　前記リソース選択部は、前記所定のリソースセット内における混雑度合と、前記所定のリソースセット外における混雑度合とに基づいて、前記所定のリソースセット内のリソースを、サイドリンク送信用のリソースの候補として使用するか否かを決定することとしてもよい。この構成により、混雑度合に応じて、所定のリソースセット内のリソースの使用可否を決定できる。 The resource selection unit sets a resource in the predetermined resource set as a candidate for side link transmission based on the congestion degree in the predetermined resource set and the congestion degree outside the predetermined resource set. It may be determined whether to use or not. With this configuration, it is possible to determine availability of resources in a predetermined resource set according to the degree of congestion.
　前記リソース選択部は、前記所定のリソースセット内のリソースを、サイドリンク送信用のリソースの候補として使用しない場合において、リソース選択ウィンドウ内のリソースプールから、前記所定のリソースセット内のリソースを除外したリソースを、サイドリンク送信用のリソースの候補として使用することとしてもよい。この構成により、使用しないリソースを予め除いた候補リソースに対してリソース選択処理を実施できる。 The resource selection unit excludes the resource in the predetermined resource set from the resource pool in the resource selection window when the resource in the predetermined resource set is not used as a resource candidate for side link transmission. Resources may be used as candidate resources for side link transmission. With this configuration, resource selection processing can be performed on candidate resources from which resources not to be used have been removed.
　前記リソース選択部は、基地局から受信する制御情報に基づいて、他のユーザ装置に対して割り当てられるリソースを、サイドリンク送信用のリソースの候補から除外することとしてもよい。この構成により、他のユーザ装置に対して割り当てられるリソースを、適切にサイドリンク送信用のリソースの候補から除外することができる。 The resource selection unit may exclude resources allocated to other user apparatuses from candidates for sidelink transmission based on control information received from a base station. With this configuration, resources allocated to other user apparatuses can be appropriately excluded from the candidate resources for side link transmission.
　（実施形態の補足）
　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、ユーザ装置ＵＥと基地局１０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ユーザ装置ＵＥ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基地局１０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。 (Supplement of the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various modifications, modifications, alternatives, replacements, and the like. I will. Although specific numerical examples are used to facilitate understanding of the invention, unless otherwise noted, those numerical values are merely examples and any appropriate values may be used. The division of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in another item. It may be applied to the matters described in (unless contradictory). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operations of multiple functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by multiple components. With regard to the processing procedures described in the embodiment, the order of processing may be changed as long as there is no contradiction. Although the user apparatus UE and the base station 10 have been described using functional block diagrams for the convenience of the processing description, such an apparatus may be realized in hardware, software or a combination thereof. The software operated by the processor of the user apparatus UE according to the embodiment of the present invention and the software operated by the processor of the base station 10 according to the embodiment of the present invention are random access memory (RAM), flash memory, read only It may be stored in memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
　また、情報の通知は、本明細書で説明した態様／実施形態に限られず、他の方法で行われてもよい。例えば、情報の通知は、物理レイヤシグナリング（例えば、ＤＣＩ（Ｄｏｗｎｌｉｎｋ　Ｃｏｎｔｒｏｌ　Ｉｎｆｏｒｍａｔｉｏｎ）、ＵＣＩ（Ｕｐｌｉｎｋ　Ｃｏｎｔｒｏｌ　Ｉｎｆｏｒｍａｔｉｏｎ））、上位レイヤシグナリング（例えば、ＲＲＣ（Ｒａｄｉｏ　Ｒｅｓｏｕｒｃｅ　Ｃｏｎｔｒｏｌ）シグナリング、ＭＡＣ（Ｍｅｄｉｕｍ　Ａｃｃｅｓｓ　Ｃｏｎｔｒｏｌ）シグナリング、ブロードキャスト情報（ＭＩＢ（Ｍａｓｔｅｒ　Ｉｎｆｏｒｍａｔｉｏｎ　Ｂｌｏｃｋ）、ＳＩＢ（Ｓｙｓｔｅｍ　Ｉｎｆｏｒｍａｔｉｏｎ　Ｂｌｏｃｋ））、その他の信号又はこれらの組み合わせによって実施されてもよい。また、ＲＲＣシグナリングは、ＲＲＣメッセージと呼ばれてもよく、例えば、ＲＲＣ接続セットアップ（ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｓｅｔｕｐ）メッセージ、ＲＲＣ接続再構成（ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ）メッセージなどであってもよい。 In addition, notification of information is not limited to the aspect / embodiment described herein, and may be performed by other methods. For example, notification of information may be physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block), other signals, or a combination thereof. Also, RRC signaling may be called an RRC message, for example, RRC Connection setup (RRC Con ection Setup) message, RRC connection reconfiguration (it may be a RRC Connection Reconfiguration) message.
　本明細書で説明した各態様／実施形態は、ＬＴＥ（Ｌｏｎｇ　Ｔｅｒｍ　Ｅｖｏｌｕｔｉｏｎ）、ＬＴＥ－Ａ（ＬＴＥ－Ａｄｖａｎｃｅｄ）、ＳＵＰＥＲ　３Ｇ、ＩＭＴ－Ａｄｖａｎｃｅｄ、４Ｇ、５Ｇ、ＦＲＡ（Ｆｕｔｕｒｅ　Ｒａｄｉｏ　Ａｃｃｅｓｓ）、Ｗ－ＣＤＭＡ（登録商標）、ＧＳＭ（登録商標）、ＣＤＭＡ２０００、ＵＭＢ（Ｕｌｔｒａ　Ｍｏｂｉｌｅ　Ｂｒｏａｄｂａｎｄ）、ＩＥＥＥ　８０２．１１（Ｗｉ－Ｆｉ）、ＩＥＥＥ　８０２．１６（ＷｉＭＡＸ）、ＩＥＥＥ　８０２．２０、ＵＷＢ（Ｕｌｔｒａ－ＷｉｄｅＢａｎｄ）、Ｂｌｕｅｔｏｏｔｈ（登録商標）、その他の適切なシステムを利用するシステム及び／又はこれらに基づいて拡張された次世代システムに適用されてもよい。 Each aspect / embodiment described in the present specification is LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-Wide Band), The present invention may be applied to a system utilizing Bluetooth (registered trademark), other appropriate systems, and / or an advanced next-generation system based on these.
　本明細書で説明した各態様／実施形態の処理手順、シーケンス、フローチャートなどは、矛盾の無い限り、順序を入れ替えてもよい。例えば、本明細書で説明した方法については、例示的な順序で様々なステップの要素を提示しており、提示した特定の順序に限定されない。 As long as there is no contradiction, the processing procedure, sequence, flow chart, etc. of each aspect / embodiment described in this specification may be reversed. For example, for the methods described herein, elements of the various steps are presented in an exemplary order and are not limited to the particular order presented.
　本明細書において基地局１０によって行われるとした特定動作は、場合によってはその上位ノード（ｕｐｐｅｒ　ｎｏｄｅ）によって行われることもある。基地局１０を有する１つまたは複数のネットワークノード（ｎｅｔｗｏｒｋ　ｎｏｄｅｓ）からなるネットワークにおいて、ユーザ装置ＵＥとの通信のために行われる様々な動作は、基地局１０および／または基地局１０以外の他のネットワークノード（例えば、ＭＭＥまたはＳ－ＧＷなどが考えられるが、これらに限られない）によって行われ得ることは明らかである。上記において基地局１０以外の他のネットワークノードが１つである場合を例示したが、複数の他のネットワークノードの組み合わせ（例えば、ＭＭＥおよびＳ－ＧＷ）であってもよい。 The specific operation supposed to be performed by the base station 10 in this specification may be performed by the upper node in some cases. In a network of one or more network nodes with a base station 10, the various operations performed for communication with the user equipment UE may be performed by the base station 10 and / or other than the base station 10. It is clear that it may be done by a network node (for example but not limited to MME or S-GW etc). Although the case where one network node other than the base station 10 has been described above is illustrated, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).
　本明細書で説明した各態様／実施形態は単独で用いてもよいし、組み合わせて用いてもよいし、実行に伴って切り替えて用いてもよい。 Each aspect / embodiment described in this specification may be used alone, may be used in combination, and may be switched and used along with execution.
　ユーザ装置ＵＥは、当業者によって、加入者局、モバイルユニット、加入者ユニット、ワイヤレスユニット、リモートユニット、モバイルデバイス、ワイヤレスデバイス、ワイヤレス通信デバイス、リモートデバイス、モバイル加入者局、アクセス端末、モバイル端末、ワイヤレス端末、リモート端末、ハンドセット、ユーザエージェント、モバイルクライアント、クライアント、またはいくつかの他の適切な用語で呼ばれる場合もある。 The user equipment UE may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote communication device, a mobile subscriber station, an access terminal, a mobile terminal, by a person skilled in the art. It may also be called a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.
　基地局１０は、当業者によって、ＮＢ（ＮｏｄｅＢ）、ｅＮＢ（ｅｎｈａｎｃｅｄ　ＮｏｄｅＢ）、ベースステーション（Ｂａｓｅ　Ｓｔａｔｉｏｎ）、ｇＮＢ、またはいくつかの他の適切な用語で呼ばれる場合もある。 Base station 10 may also be referred to by those skilled in the art with NB (Node B), eNB (enhanced Node B), Base Station, gNB, or some other suitable terminology.
　本明細書で使用する「判断（ｄｅｔｅｒｍｉｎｉｎｇ）」、「決定（ｄｅｔｅｒｍｉｎｉｎｇ）」という用語は、多種多様な動作を包含する場合がある。「判断」、「決定」は、例えば、判定（ｊｕｄｇｉｎｇ）、計算（ｃａｌｃｕｌａｔｉｎｇ）、算出（ｃｏｍｐｕｔｉｎｇ）、処理（ｐｒｏｃｅｓｓｉｎｇ）、導出（ｄｅｒｉｖｉｎｇ）、調査（ｉｎｖｅｓｔｉｇａｔｉｎｇ）、探索（ｌｏｏｋｉｎｇ　ｕｐ）（例えば、テーブル、データベースまたは別のデータ構造での探索）、確認（ａｓｃｅｒｔａｉｎｉｎｇ）した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、受信（ｒｅｃｅｉｖｉｎｇ）（例えば、情報を受信すること）、送信（ｔｒａｎｓｍｉｔｔｉｎｇ）（例えば、情報を送信すること）、入力（ｉｎｐｕｔ）、出力（ｏｕｔｐｕｔ）、アクセス（ａｃｃｅｓｓｉｎｇ）（例えば、メモリ中のデータにアクセスすること）した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、解決（ｒｅｓｏｌｖｉｎｇ）、選択（ｓｅｌｅｃｔｉｎｇ）、選定（ｃｈｏｏｓｉｎｇ）、確立（ｅｓｔａｂｌｉｓｈｉｎｇ）、比較（ｃｏｍｐａｒｉｎｇ）などした事を「判断」「決定」したとみなす事を含み得る。つまり、「判断」「決定」は、何らかの動作を「判断」「決定」したとみなす事を含み得る。 The terms "determining", "determining" as used herein may encompass a wide variety of operations. "Judgment", "decision" are, for example, judging, calculating, calculating, processing, processing, deriving, investigating, looking up (for example, a table) (Searching in a database or another data structure), ascertaining may be regarded as “decision”, “decision”, etc. Also, "determination" and "determination" are receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (Accessing) (for example, accessing data in a memory) may be regarded as “judged” or “decided”. Also, "judgement" and "decision" are to be considered as "judgement" and "decision" that they have resolved (resolving), selecting (selecting), choosing (choosing), establishing (establishing), etc. May be included. That is, "judgment" "decision" may include considering that some action is "judged" "decision".
　本明細書で使用する「に基づいて」という記載は、別段に明記されていない限り、「のみに基づいて」を意味しない。言い換えれば、「に基づいて」という記載は、「のみに基づいて」と「に少なくとも基づいて」の両方を意味する。 As used herein, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."
　「含む（ｉｎｃｌｕｄｅ）」、「含んでいる（ｉｎｃｌｕｄｉｎｇ）」、およびそれらの変形が、本明細書あるいは特許請求の範囲で使用されている限り、これら用語は、用語「備える（ｃｏｍｐｒｉｓｉｎｇ）」と同様に、包括的であることが意図される。さらに、本明細書あるいは特許請求の範囲において使用されている用語「または（ｏｒ）」は、排他的論理和ではないことが意図される。 As long as "includes", "including", and variations thereof are used in the present specification or claims, these terms as well as the term "comprising" Is intended to be comprehensive. Further, it is intended that the term "or" as used in the present specification or in the claims is not an exclusive OR.
　本開示の全体において、例えば、英語でのａ，ａｎ，及びｔｈｅのように、翻訳により冠詞が追加された場合、これらの冠詞は、文脈から明らかにそうではないことが示されていなければ、複数のものを含み得る。 Throughout the present disclosure, when articles are added by translation, such as, for example, a, an, and the in English, these articles are not clearly indicated by the context: May contain multiple things.
　以上、本発明について詳細に説明したが、当業者にとっては、本発明が本明細書中に説明した実施形態に限定されるものではないということは明らかである。本発明は、特許請求の範囲の記載により定まる本発明の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。したがって、本明細書の記載は、例示説明を目的とするものであり、本発明に対して何ら制限的な意味を有するものではない。 Although the present invention has been described above in detail, it is apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be embodied as modifications and alterations without departing from the spirit and scope of the present invention defined by the description of the claims. Accordingly, the description in the present specification is for the purpose of illustration and does not have any limiting meaning on the present invention.
１０１　信号送信部
１０２　信号受信部
１０３　設定情報管理部
１０４　リソース選択部
１０５　チャネル状態報告部
２０１　信号送信部
２０２　信号受信部
２０３　設定情報管理部
２０４　リソース割り当て部
１００１　プロセッサ
１００２　メモリ
１００３　ストレージ
１００４　通信装置
１００５　入力装置
１００６　出力装置 101 Signal Transmission Unit 102 Signal Reception Unit 103 Setting Information Management Unit 104 Resource Selection Unit 105 Channel Status Report Unit 201 Signal Transmission Unit 202 Signal Reception Unit 203 Setting Information Management Unit 204 Resource Allocation Unit 1001 Processor 1002 Memory 1003 Storage 1004 Storage Device 1005 Communication Device 1005 Input Device 1006 Output device

Claims (6)

  1. 　リソースプールからリソースを選択し、選択したリソースを使用してサイドリンク送信を行うユーザ装置であって、
    　前記リソースプールにおける所定のリソースセットの設定情報を格納する設定情報管理部と、
    　サイドリンク送信用のリソースとして、前記所定のリソースセット外のリソースを、前記所定のリソースセット内のリソースよりも優先して選択するリソース選択部と
    　を備えるユーザ装置。     A user apparatus that selects a resource from a resource pool and performs side link transmission using the selected resource,
    A setting information management unit that stores setting information of a predetermined resource set in the resource pool;
    A resource selection unit configured to select a resource outside the predetermined resource set as a resource for side link transmission in preference to a resource in the predetermined resource set.
  2. 　前記リソース選択部は、前記所定のリソースセット内のリソースに対する受信電力の測定結果にオフセットを適用することによりリソース選択を実行する
    　請求項１に記載のユーザ装置。     The user apparatus according to claim 1, wherein the resource selection unit performs resource selection by applying an offset to a measurement result of reception power for resources in the predetermined resource set.
  3. 　前記リソース選択部は、前記所定のリソースセット内における混雑度合と、前記所定のリソースセット外における混雑度合とに基づいて、前記所定のリソースセット内のリソースを、サイドリンク送信用のリソースの候補として使用するか否かを決定する
    　請求項１又は２に記載のユーザ装置。     The resource selection unit sets a resource in the predetermined resource set as a candidate for side link transmission based on the congestion degree in the predetermined resource set and the congestion degree outside the predetermined resource set. The user apparatus according to claim 1, which determines whether or not to use it.
  4. 　前記リソース選択部は、前記所定のリソースセット内のリソースを、サイドリンク送信用のリソースの候補として使用しない場合において、リソース選択ウィンドウ内のリソースプールから、前記所定のリソースセット内のリソースを除外したリソースを、サイドリンク送信用のリソースの候補として使用する
    　請求項３に記載のユーザ装置。     The resource selection unit excludes the resource in the predetermined resource set from the resource pool in the resource selection window when the resource in the predetermined resource set is not used as a resource candidate for side link transmission. The user apparatus according to claim 3, wherein the resource is used as a candidate for resource for sidelink transmission.
  5. 　前記リソース選択部は、基地局から受信する制御情報に基づいて、他のユーザ装置に対して割り当てられるリソースを、サイドリンク送信用のリソースの候補から除外する
    　請求項１ないし４のうちいずれか１項に記載のユーザ装置。     The resource selection unit excludes resources to be allocated to another user apparatus from candidate resources for side link transmission based on control information received from a base station. User equipment according to clause.
  6. 　リソースプールからリソースを選択し、選択したリソースを使用してサイドリンク送信を行うユーザ装置が実行するリソース選択方法であって、
    　前記リソースプールにおける所定のリソースセットの設定情報を保持するステップと、
    　サイドリンク送信用のリソースとして、前記所定のリソースセット外のリソースを、前記所定のリソースセット内のリソースよりも優先して選択するステップと
    　を備えるリソース選択方法。     A resource selection method executed by a user apparatus that selects a resource from a resource pool and performs sidelink transmission using the selected resource,
    Holding configuration information of a predetermined resource set in the resource pool;
    Selecting a resource other than the predetermined resource set as a resource for side link transmission in preference to a resource in the predetermined resource set.
PCT/JP2017/047278 2017-12-28 2017-12-28 User device and resource selection method WO2019130556A1 (en)

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