WO2017150601A1 - Équipement utilisateur et procédé d'accès aléatoire - Google Patents

Équipement utilisateur et procédé d'accès aléatoire Download PDF

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Publication number
WO2017150601A1
WO2017150601A1 PCT/JP2017/008083 JP2017008083W WO2017150601A1 WO 2017150601 A1 WO2017150601 A1 WO 2017150601A1 JP 2017008083 W JP2017008083 W JP 2017008083W WO 2017150601 A1 WO2017150601 A1 WO 2017150601A1
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Prior art keywords
random access
message
access signal
size
base station
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PCT/JP2017/008083
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English (en)
Japanese (ja)
Inventor
高橋　秀明
徹 内野
ウリ アンダルマワンティ ハプサリ
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株式会社Ｎｔｔドコモ
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Priority claimed from JP2016105565A external-priority patent/JP2017163519A/ja
Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to CN201780003687.6A priority Critical patent/CN108141890B/zh
Priority to EP17760065.7A priority patent/EP3425989B1/fr
Priority to US15/767,300 priority patent/US10660135B2/en
Publication of WO2017150601A1 publication Critical patent/WO2017150601A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to a random access procedure executed between a user apparatus (hereinafter referred to as UE) and a base station (hereinafter referred to as eNB) in a wireless communication system.
  • UE user apparatus
  • eNB base station
  • a random access (hereinafter sometimes abbreviated as RA) procedure is executed when a UE establishes a connection with an eNB, or when reconnection (resynchronization) is performed.
  • the RA procedure includes a collision type RA procedure and a non-collision side RA procedure.
  • the collision-type RA procedure can be used for all purposes, and the non-collision-side RA procedure is used for a specific purpose such as handover.
  • the collision type RA procedure is targeted.
  • the UE transmits RA preamble to the eNB, and the eNB returns RA response to the UE. Then, the UE transmits a control message to the eNB using the uplink resource allocated by UL grant in the RA response.
  • This control message is called Message 3 (message 3) (Non-Patent Document 1).
  • an RRCConnectionRequest message is sent at the time of connection, and an RRCConnectionReestablishmentRequest message is sent at the time of reconnection via CCCH (Common Control Channel), which is a logical channel.
  • CCCH Common Control Channel
  • the RRCConnectionRequest message and RRCConnectionReestablishementRequest message are generically called CCCH Service Data Unit (SDU) in the standard specifications.
  • SDU Service Data Unit
  • the size of RRCConnectionRequestRRmessage and RRCConnectionReestablishmentRequest message is 48 bits, 8 bits of MAC header are added to this, and the MAC PDU is 56 bits. That is, 56-bit data becomes one Transport block that can be transmitted by the physical layer (PHY), and its size (56 bits) becomes Transport block Size (TBS).
  • PHY physical layer
  • TBS Transport block Size
  • a value larger than 56 bits can be assigned as the TBS of Message IV3.
  • Padding Buffer Status Report (Padding BSR) is added to the data.
  • Padding BSR Padding Buffer Status Report
  • LTE it is specified that the RA preamble is grouped and the UE performs the RA procedure using the RA preamble selected from the group (Non-Patent Document 2).
  • the eNB can determine whether or not the size of Message 3 is increased depending on the group to which the transmitted RA-preamble belongs, and can notify the UE of the corresponding TBS with RA-response.
  • Preamble group A / B is provided. And if Preamble group B exists, if the size of Message 3 is larger than the message size (messageSizeGroupA in RACH-ConfigCommon) set in the system information and the path loss is less than or equal to the predetermined value, Preamble group B RA preamble is selected. Otherwise, RA preamble is selected from Preamble group A.
  • Non-Patent Document 3 describes an example as solution 18.
  • the UE in order to resume RRC connection using the saved UE context, the UE sends a restart request message with Message 3. Since an ID and authentication information used for resuming the connection are added to this message, the message size may exceed the 56 bits of the existing CCCH SDU TBS (for example, Non-Patent Document 4).
  • the UE transmits CCCH SDUs of different sizes to the eNB according to the procedure. As an example, it is assumed that the UE transmits a normal RRC connection request with a 56-bit TBS and transmits RRC connection resume with a 64-bit TBS.
  • the message size of CCCH SDU was one (TBS: 56 bits).
  • TBS 56 bits
  • eNB will assign CCCH by the time of assigning UL grant of Message 3 in RA response. It is necessary to decide the TBS assigned by UL grant considering the size of SDU.
  • the TBS to be assigned by UL grant cannot be determined in consideration of the size of CCCH SDU. For this reason, for example, even if the UE tries to transmit a resume request message, it may occur that TBS is insufficient and cannot be transmitted.
  • the present invention has been made in view of the above points, and provides a technique for preventing a user apparatus from being unable to transmit a control message due to a lack of uplink resources allocated from a base station in a random access procedure. With the goal.
  • a random access signal group is selected from a plurality of random access signal groups by comparing the size of a message transmitted on a predetermined logical channel with a predetermined threshold, and a random access signal is selected from the random access signal group.
  • a selection section to select;
  • the transmission unit transmits the message on the predetermined logical channel using a resource allocated by a response from the base station to the random access signal.
  • the user device that communicates with the base station, A receiving unit that receives information on a correspondence relationship between a size of a message transmitted on a predetermined logical channel and a resource of a random access signal from the base station; A selection unit that selects a resource corresponding to the size of a message transmitted on the predetermined logical channel from the information on the correspondence;
  • a user apparatus comprising: a transmission unit that transmits a random access signal to the base station using the selected resource.
  • a technique for preventing a user apparatus from being unable to transmit a control message due to a lack of uplink resources allocated from a base station in a random access procedure is provided.
  • FIG. 10 is a flowchart illustrating a processing procedure in the second embodiment. It is a figure which shows the example of a specification change in Example 2. FIG. It is a figure which shows the example of a specification change in Example 2. FIG.
  • FIG. 10 is a diagram for explaining a modification of the second embodiment. 10 is a flowchart illustrating a processing procedure in a modification of the second embodiment. It is a figure which shows the example of a specification change in the modification of Example 2. FIG. It is a figure which shows the example of a specification change in the modification of Example 2. FIG. It is a figure which shows the example of a specification change in the modification of Example 2. FIG. It is a figure which shows the example of a specification change in the modification of Example 2.
  • FIG. 10 is a flowchart illustrating a processing procedure in the third embodiment.
  • FIG. 10 is a flowchart illustrating a processing procedure in the fourth embodiment. It is a block diagram of UE. It is a HW block diagram of UE. It is a block diagram of eNB. It is a HW block diagram of eNB.
  • LTE Long Term Evolution
  • LTE Long Term Evolution
  • FIG. 1 is a diagram illustrating a configuration example of a communication system according to an embodiment of the present invention.
  • the communication system of the present embodiment includes an eNB 10, an eNB 20, an MME 30, a serving gateway (S-GW) 40, and a UE 50.
  • S-GW serving gateway
  • the UE 50 is a user device such as a mobile phone.
  • Each of the eNBs 10 and 20 is a base station.
  • the MME 30 is a node device that accommodates the eNB and performs location control, mobility control such as paging and handover, bearer establishment / deletion, and the like.
  • the S-GW 40 is a node device that relays user data (U-Plane data).
  • a system composed of the MME 30 and the S-GW 40 is called a communication control device.
  • the MME 30 and the S-GW 40 may be configured as a single device and referred to as a communication control device.
  • the MME 30 and the eNBs 10 and 20 are connected by an S1-MME interface, and the S-GW 40 and the eNBs 10 and 20 are connected by an S1-U interface.
  • a dotted connection line indicates a control signal interface, and a solid connection line indicates a user data transfer interface.
  • the technique according to the present invention can be applied not only to the random access at the time of resuming the connection in the above-described UE context maintaining system, but in this embodiment, as one application example of the present invention, the UE context maintaining system Is used.
  • RRC-Suspended a method for defining a new RRC state which is a method described in Non-Patent Document 3 (context maintenance method 1) And a scheme (context holding scheme 2) for reusing the UE context without defining a new RRC state. Examples of these sequences will be described later.
  • Random access procedure In this embodiment, since a random access procedure between a user apparatus (referred to as UE) and a base station eNB (referred to as eNB) is targeted, first, basic processing of the random access procedure will be described.
  • UE user apparatus
  • eNB base station eNB
  • Random access (hereinafter referred to as RA) is performed when the UE establishes a connection with the eNB at the time of transmission or the like, and its main purpose is to establish uplink synchronization.
  • the RA procedure includes a collision-type RA procedure and a non-collision-side RA procedure.
  • the collision-type RA procedure can be used for all purposes, and the non-collision-side RA procedure is used for a specific purpose such as handover. In this embodiment, the collision RA procedure is targeted.
  • the collision RA procedure will be described with reference to FIG.
  • the UE transmits an RA ⁇ ⁇ preamble (selected sequence) through a Physical Random Access Channel (PRACH) using one sequence from a predetermined number of RA preambles (sequence) (step S1). If there is no other UE that performs random access using the same sequence at the same time, no collision occurs.
  • PRACH Physical Random Access Channel
  • step S2 the eNB utilizes DL-SCH (downlink shared channel), TA (timing advance) command for adjusting the transmission timing of the UE, detected RA preamble index, uplink resource allocation information (ULrantgrant ) Including RA) response (response) is transmitted to the UE.
  • DL-SCH downlink shared channel
  • TA timing advance
  • RA uplink resource allocation information
  • ULrantgrant uplink resource allocation information
  • Including RA RA response
  • the UE that has received the RA response adjusts the uplink timing and transmits a control message such as RRC connection request to the eNB by CCCH using the allocated resource (step S3).
  • the UE When the UE that sent the RA preamble fails to receive the RA response (when the random access attempt fails), the UE increases the transmission power by a predetermined step size and performs PRACH each time it fails. Send. Such an operation is called Power Ramping.
  • step S4 the eNB transmits contention resolution (contention resolution message).
  • the UE that has received the contention resolution completes the random access process by confirming that its own ID (eg, TC-RNTI, which was used for scrambling in step S3) is included. Send and receive.
  • its own ID eg, TC-RNTI, which was used for scrambling in step S3
  • ⁇ Context retention method 1 First, the context holding method 1 will be described.
  • the context maintenance method 1 in addition to the conventional RRC-Idle (RRC idle state) and RRC-Connected (RRC connection state), a state of RRC-Suspended (referred to as RRC suspension state) is added.
  • RRC suspension state a state of RRC-Suspended (referred to as RRC suspension state) is added.
  • RRC hold state the UE and the eNB each hold the UE context used for connection in the RRC connection state before entering the RRC hold state. Then, when transitioning from the RRC hold state to the RRC connection state, RRC connection establishment is performed using the held UE context.
  • step S11 the eNB 10 determines to suspend the RRC connection.
  • step S12 the eNB 10 transmits a message indicating that the RRC connection of the UE 50 is suspended to the MME 30. MME10 and eNB30 hold
  • step S15 the MME 30 returns an Ack for step S12.
  • step S16 the MME 30 enters the ECM-SUSPENDED state.
  • step S17 the eNB 10 transmits an RRC connection suspend message to the UE 50 to place the UE 50 in the RRC suspension state (step S18).
  • the RRC connection suspend message includes Resume ID (resumption ID).
  • Resume ID is an identifier used when the RRC connection is resumed next time.
  • the UE 50 and the eNB 10 each store a UE context.
  • the UE context held in each of the UE 50 and the eNB 10 includes, for example, an RRC configuration (RRC configuration), a bearer configuration (including bearer configuration: RoHC state information, etc.), an AS security context. (Access Stratum Security Context), L2 / L1 parameters (MAC, PHY configuration, etc.).
  • RRC configuration RRC configuration
  • bearer configuration including bearer configuration: RoHC state information, etc.
  • AS security context Access Stratum Security Context
  • L2 / L1 parameters MAC, PHY configuration, etc.
  • the UE 10 and the eNB 10 each retain the above information as a UE context, so that when transitioning from the RRC hold state to the RRC connection state, the RRC Connection Setup Complete, RRC Security Mode Command, RRC Security Mode Complete, RRC Connection Reconfiguration RRC connection can be established without sending / receiving messages such as RRC ConnectionRReconfiguration Complete.
  • FIG. 4 shows a case where the UE 50 in the RRC hold state (step S51) receives an incoming call (steps S52 to S55).
  • step S51 receives an incoming call
  • steps S52 to S55 receives an incoming call
  • step S56 an RRC restart procedure (resume procedure) is started from the EMM layer. Random57Access Preamble is transmitted from the UE 50 to the eNB 10 in step S57, and Random58Access Response is returned from the eNB 10 to the UE 10 in step S58.
  • step S59 the UE 50 transmits an RRC ⁇ Connection Resume Request message to the eNB 10 as the message 3.
  • the RRC Connection Resume Request message includes Resume ID (resumption ID), authentication information, and the like indicating that the UE 50 holds the UE context.
  • the eNB 10 that has received the RRC Connection Resume Request message obtains the UE context of the UE 50 stored in association with the Resume Id included in the message, and performs bearer resumption and the like based on the UE context information.
  • the eNB 10 transmits an RRC ⁇ Connection Resume Complete message including Resume ⁇ ⁇ ⁇ ⁇ ⁇ Id to the UE 50.
  • step S61 the UE 50 and the eNB 10 resume the stored security context.
  • steps S62 to S65 notification of a change in the state of the UE 50 to the MME 30 is performed.
  • the context holding method 2 will be described.
  • the context maintenance method 2 does not define a new state such as RRC-Suspended, and the UE and the eNB hold the UE context in the RRC idle state, and hold it when transitioning to the RRC connected state.
  • the number of signaling can be reduced by reusing the UE context.
  • the UE 50 is in an RRC connection state in the cell of the eNB 10 and an S1-C / U connection related to the UE 50 is established.
  • the S1-C connection includes a connection between the eNB 10 and the MME 30 and a connection between the MME 30 and the S-GW 40
  • the S1-U connection includes a connection between the eNB 10 and the S-GW 40.
  • the procedure related to the first connection can also be applied to the context holding method 1.
  • the eNB 10 transmits RRC ⁇ Connection Setup to the UE 50, sets the UE 50 to the RRC connection state, and receives RRC Connection Setup Complete from the UE 50.
  • the eNB 10 receives an Initial Context Setup Request from the MME 30, transmits an RRC Security Mode to the UE 50, receives an RRC Security Mode Complete from the UE 50, and transmits an RRC Connection Reconfiguration to the UE 50, RRC Connection Reconfiguration Complete is received from UE50, and InitialInContext Setup Response is transmitted to MME30.
  • the UE context and the UE context are established and held in the UE 50 and the eNB 10.
  • the eNB 10 transmits a connection maintenance instruction signal to the MME 30 (step S71). Also, the MME 30 transmits a connection maintenance instruction signal to the S-GW 40 (step S72).
  • the connection maintenance instruction signal is a signal that instructs the MME 30 to perform the paging by holding down the downlink data in the S-GW 40 when receiving the call to the UE 50 while maintaining the S1-C / U connection related to the UE 50.
  • the S-GW 40 that has received the connection maintenance instruction signal transmits a confirmation response indicating that the instruction has been confirmed to the MME 30 (step S73), and the MME 30 transmits a confirmation response to the eNB 10 (step S74).
  • connection maintenance instruction signal from the eNB 10 to the MME 30 regarding the UE 50 may be triggered by, for example, an event that causes the UE 50 to transition to the RRC idle state in the eNB 10, or the UE 50 is initially under the control of the eNB 10. It may be performed immediately after entering the RRC connection state and establishing the S1-C / U connection for the UE 50.
  • the event that causes the transition to the RRC idle state is, for example, when it is detected that communication with the UE 50 (uplink / downlink user data communication) does not occur for a certain period of time due to expiration of a predetermined timer (eg, UE : Inactivity Timer). However, it is not limited to this.
  • FIG. 5 assumes a case where it is triggered by detecting that communication with the UE 50 (uplink / downlink user data communication) does not occur for a certain period of time.
  • RRC connection release RRC Connection
  • Release is transmitted to the UE 50, and the UE 50 is shifted to the RRC idle state (step S75). Even when the UE 50 transitions to the RRC idle state, the UE context established at the time of RRC connection is maintained in each of the UE 50 and the eNB 10.
  • step S76 downlink data for the UE 50 is generated, and the downlink data arrives at the S-GW 40 (step S76).
  • the S1-U connection has been established, but based on the connection maintenance instruction signal received in step S72, the S-GW 40 holds the downlink data in the buffer without transferring it to the eNB 10.
  • the S-GW 40 transmits a downlink data incoming notification to the MME 30 (step S77), and the MME 30 transmits an S1-AP paging signal for the UE 50 to the eNB 10 (step S78).
  • This paging itself is the same as the existing paging, and is transmitted to each eNB in the tracking area of the UE 50, but FIG. 5 shows transmission to the eNB 10.
  • the eNB 10 that has received the S1-AP paging signal transmits the RRC paging signal to the subordinate UE 50 (step S79).
  • the UE50 which received the RRC paging signal performs an RRC connection establishment procedure, and establishes an RRC connection (step S80). Thereafter, the eNB 10 transmits RRC connection establishment completion, which is a signal indicating that establishment of the RRC connection is completed, to the MME 30 (step S81).
  • the MME 30 transmits an RRC connection establishment completion signal to the S-GW 40 (step S82).
  • the S-GW 40 determines that the RRC connection between the UE 50 and the eNB 10 has been established, and uses the S1-U connection related to the UE 50 that has already been established to transfer the pending downlink data to the eNB 10.
  • Start step S83.
  • the downlink data reaches the UE 50 from the eNB 10 (step S84). In this way, transmission of downlink data to the UE 50 is started.
  • RRC connection establishment can be performed without transmitting / receiving messages such as Reconfiguration, RRC ⁇ Connection Reconfiguration Complete, and the like.
  • Examples 1 to 4 will be described below as methods for solving the problems in the random access procedure described above. That is, Embodiments 1 to 4 will be described as an example of a method for avoiding that the UE cannot transmit because the TBS is insufficient even if the UE tries to transmit Message 3.
  • the entire random access procedure in each of the following embodiments is as shown in FIG.
  • the user apparatus is referred to as UE
  • the base station is referred to as eNB.
  • Example 1 First, Example 1 will be described.
  • the UE selects an RA preamble group from RA preamble group A / B in the random access procedure, the size of the CCCH SDU is not satisfied even if it falls outside the conditions for selecting an existing RA preamble group B.
  • (size including the MAC header) is larger than messageSizeGroupA, RA preamble group B is selected, and RA preamble is selected from RA preamble group B and transmitted.
  • RA preamble group B exists. That is, the UE receives an SIB2 message (or RRC dedicated message) from the eNB, and in RACH-ConfigCommon in the message, sizeOfRA-PreamblesGroupA (the number of preambles of Group A) is not equal to numberOfRA-Preambles (the number of all preambles) The UE determines that RA preamble group B exists.
  • messageSizeGroupA is a parameter in RACH-ConfigCommon, and is a threshold value to be compared with the message size (size of Message 3) in the selection determination of RA ⁇ preamble group A / B.
  • FIG. 6 shows a description example (excerpt) of the specification (3GPP TS 36.321) corresponding to the operation of the UE of the first embodiment.
  • the changed part from Non-Patent Document 2 is underlined.
  • the condition that CCCH SDU size is larger than messageSizeGroupA is added to the condition for determining RA preamble group B with OR. .
  • the UE according to the first embodiment conforming to this specification first determines whether or not RA ⁇ preamble group B exists before performing step S1 shown in FIG. I do.
  • the UE determines whether the size of the message (UL data + MAC header, if necessary + MAC CE) to be transmitted as Message 3 is larger than messageSizeGroupA and the path loss is equal to or smaller than a predetermined value. If the determination result is Yes, RA preamble group B is selected.
  • CCCH SDU size in the present embodiment (examples 1 to 4) means a size to which MAC header is added even if it is not explicitly described that the size is the sum of MAC header. However, instead of this, the size of CCCH SDU not including MAC header may be used.
  • the UE selects RA preamble group A.
  • the UE randomly selects one RA preamble from the RA preamble in the selected group and transmits it to the eNB (step S1 in Fig. 2).
  • a larger TBS is assigned as a UL resource than when the RA preamble of RA preamble group A is received, and the RA response including UL grant is assigned to the UE. (Step S2 in FIG. 2). Thereby, UE can transmit Message 3 larger than 56 bits to eNB, for example.
  • FIG. 7 shows another example of the description (excerpt) of the specification (3GPP TS 36.321) corresponding to the operation of the UE of the first embodiment.
  • the example shown in FIG. 7 is an example that clearly describes that the size to be compared with messageSizeGroupA is the size of “CCCH SDU size + MAC header”. That is, the UE executing the operation of the specification determines whether or not “the random access procedure is started for the CCCH logical channel and“ CCCH SDU size + MAC header ”is larger than messageSizeGroupA”. If the result is Yes, RA preamble group B is selected, except for this part, which is the same as in Fig. 6.
  • the random access procedure is started for the CCCH logical channel means, for example, RRCConnectionRequest This corresponds to the initiation of a random access procedure for transmitting message, RRCConnectionReestablishmentRequestRemessage, RRC connection resume message, and the like.
  • the value of messageSizeGroupA notified from the eNB to the UE is not limited to a specific value, but is 56 bits, for example.
  • Embodiment 1 is particularly suitable when only one additional CCCH SDU size is specified in addition to the current 56-bit TBS.
  • the technique of the first embodiment can be used even when two or more additional CCCH ⁇ SDU sizes are defined.
  • Example 2 Next, Example 2 will be described.
  • a new RA preamble group is provided for a newly added CCCH SDU size.
  • Group C is newly added. That is, in this case, a plurality of preambles that can be randomly selected by the UE (e.g., 64, values notified by numberOfRA-Preambles of RACH-ConfigCommon) are divided into three groups (Group C, Group B, and Group C). .
  • the UE starts a random access procedure when, for example, it wishes to transmit the above-mentioned message for resuming connection to the eNB as Message 3.
  • step S101 for example, the UE grasps that the RA-Preamble is not explicitly signaled from the eNB, and starts the RA-preamble selection process in the MAC layer.
  • step S102 the UE determines whether or not message size (CCCH SDU + MAC header) to be transmitted is equal to the message size of Group C. If the determination result is Yes, the process proceeds to step S104, Group C is selected, and RA preamble is selected from Group C.
  • message size CCCH SDU + MAC header
  • step S102 determines whether the Potential message size (UL data + MAC header, if necessary, + MAC CE) is larger than the Message message size of Group C, and the path loss is equal to or less than a predetermined value. If the determination result is Yes, the process proceeds to step S105, Group B is selected, and RA preamble is selected from Group B. Note that “Potential message size” is the size of the message scheduled to be sent as Message 3.
  • step S103 determines whether the determination result in step S103 is No. If the determination result in step S103 is No, the process proceeds to step S106, where Group A is selected, and RA preamble is selected from Group A.
  • the eNB allocates a 64-bit TBS to the UE when the Group C RA preamble is received from the UE. Also, in this case, when the eNB receives the Group B RAmblepreamble from the UE, the eNB allocates a TBS larger than 64 bits (e.g., 80 bits) to the UE. Also, when the Group A RA preamble is received from the UE, a TBS smaller than 64 bits (e.g., 56 bits) is allocated to the UE.
  • FIG. 9 shows a description example (excerpt) of specifications (3GPP TS 36.321, 5.1.1) corresponding to the operation of the UE of the second embodiment.
  • the changed part from Non-Patent Document 2 is underlined.
  • the preambles included in RA Preambles group A, RA Preambles group B, and RA Preambles ⁇ group C are calculated from parameters of numberOfRA-Preambles, sizeOfRA-PreamblesGroupA, and sizeOfRA-PreamblesGroupC. ing.
  • the preamble of RA Preamble Group C is from sizeOfRA-PreamblesGroupA to numberOfRA-PreamblesC-1
  • the preamble of RA ⁇ Preamble Group B is from sizeOfRA-PreamblesGroupC to numberOfRA-Preambles- It is specified that
  • FIG. 10 shows a description example (excerpt) of specifications (3GPP TS 36.321, 5.1.2) corresponding to the operation of the UE of the second embodiment.
  • the changed part from Non-Patent Document 2 is underlined.
  • the description example shown in FIG. 10 corresponds to the content of the flowchart shown in FIG. As shown in FIG. 10, when Group ⁇ C does not exist, Group B is selected when potential message size is equal to or larger than message size of Group A and the path loss is equal to or less than a predetermined value, as in the conventional case.
  • FIG. 11 and FIG. 12 show a description example (extract) of the specification (3GPP TS 36.331) corresponding to the operation of the UE of the second embodiment.
  • the changed part from the nonpatent literature 5 is underlined.
  • RACH-ConfigCommon information element parameters such as sizeOfRA-PreamblesGroupC, messageSizeGroupC, and messagePowerOffsetGroupB are added to RACH-ConfigCommon information element.
  • messageSizeGroupC is a threshold value used for determination (message size of GroupC).
  • sizeOfRA-PreamblesGroupC is the size (number of preambles) of GroupC.
  • RA preamble groups are provided so as to be divided into five patterns shown in FIG.
  • the message size of RA preamble group A is 56 bits and the message size of RA preamble group C is 80 bits, but this is only an example.
  • RACH-ConfigCommon a plurality of preambles that can be randomly selected by the UE are divided into four groups (Group D, Group C, Group B, and Group C).
  • the UE starts a random access procedure when, for example, it wishes to transmit the above-mentioned message for resuming connection to the eNB as Message 3.
  • step S201 the UE grasps that the RA-Preamble has not been explicitly signaled from the eNB, and starts the RA-preamble selection process in the MAC layer.
  • step S202 the UE determines whether the Potential message size (UL data + MAC header, if necessary, + MAC CE) is larger than the Message message size of Group C, and the path loss is equal to or less than a predetermined value. If the determination result is Yes, the process proceeds to step S204, Group B is selected, and RA preamble is selected from Group B.
  • step S202 determines whether or not message size (CCCH SDU + MAC header) of Message 3 to be transmitted is equal to message80size (eg, 80 bits) of Group C. If the determination result is Yes, the process proceeds to step S205, Group C is selected, and RA preamble is selected from Group C.
  • message size CCCH SDU + MAC header
  • message80size eg, 80 bits
  • step S206 the UE determines that “Potential message size (UL data + MAC header, if necessary, + MAC CE) is smaller than Group C message size and PotentialPmessage size (UL data + MAC header, if necessary, It is determined whether + MAC CE) is larger than Group A message56size (for example, 56 bits) and the path loss is equal to or less than a predetermined value. If the determination result is Yes, the process proceeds to step S207, where Group D is selected, and RA preamble is selected from Group D. If the determination result is No, the process proceeds to step S208, Group A is selected, and RA preamble is selected from Group A.
  • the eNB receives the Group C RA preamble from the UE. It is conceivable to allocate a bit TBS to the UE. In addition, when the eNB receives RA preamble of Group B from the UE, the eNB allocates a TBS larger than 80 bits to the UE. In addition, when a Group A RA preamble is received from a UE, a 56-bit TBS is allocated to the UE. In addition, when a Group D RA preamble is received from the UE, a TBS larger than 56 bits and smaller than 80 bits (eg, 64 bits) is allocated to the UE.
  • FIG. 15 shows a description example (excerpt) of a specification (3GPP TS 36.321, 5.1.1) corresponding to the UE operation of the modified example of the second embodiment.
  • 3GPP TS 36.321, 5.1.1 a specification of a specification
  • FIG. 15 changes from Non-Patent Document 2 are underlined.
  • the preambles included in RA Preambles group A, RA Preambles group B, RA Preambles group C, and RA Preambles group D are calculated from the parameters of numberOfRA-Preambles, sizeOfRA-PreamblesGroupA, and sizeOfRA-PreamblesGroupC. Is stipulated.
  • the preamble of RA Preamble Group C is from sizeOfRA-PreamblesGroupA to numberOfRA-PreamblesC-1 ⁇
  • the preamble of RA Preamble Group D is from sizeOfRA-PreamblesGroupC It is specified that numberOfRA-PreamblesD-1 and the preamble of RA Preamble Group B is from sizeOfRA-PreamblesGroupD to numberOfRA-Preambles-1.
  • FIG. 16 shows a description example (excerpt) of specifications (3GPP TS 36.321, 5.1.2) corresponding to the operation of the UE according to the modification of the second embodiment.
  • the changes from Non-Patent Document 2 are underlined.
  • the description example shown in FIG. 16 corresponds to the content of the flowchart shown in FIG. As shown in FIG. 16, when Group ⁇ C does not exist, Group B is selected when potential message size is equal to or larger than message size of Group A and the path loss is equal to or less than a predetermined value, as in the conventional case.
  • FIG. 17 and 18 show a description example (excerpt) of a specification (3GPP TS 36.331) corresponding to the operation of the UE according to the modification of the second embodiment.
  • the changes from Non-Patent Document 5 are underlined.
  • RACH-ConfigCommon information element parameters such as sizeOfRA-PreamblesGroupC, messageSizeGroupC, messagePowerOffsetGroupB, and sizeOfRA-PreamblesGroupD are added to RACH-ConfigCommon information element.
  • messageSizeGroupC is a threshold value used for determination (message size of GroupC).
  • sizeOfRA-PreamblesGroupC is the size (number of preambles) of GroupC.
  • Example 3 Next, Example 3 will be described.
  • 64 different RA preamble resources PRACH resources
  • 64 is an example.
  • the UE can determine the number based on system information from the eNB or RRC dedicated signaling. In the following description, it is assumed that there are 64.
  • the CCCH SDU size and the RA preamble resource do not need to correspond one-to-one, and may correspond to one-to-N (N is an integer of 2 or more), for example.
  • each of 64 different RA preamble sequences corresponds to the size of CCCH SDU. For example, when transmitting a 72-bit CCCH SDU message, the UE transmits an RA preamble sequence 1 corresponding to 80 bits, and when transmitting a 56-bit CCCH SDU message, the UE supports an RA corresponding to 56 bits. Transmit preamble series 2.
  • the RA preamble sequence may be the same regardless of the CCCH SDU size, and the frequency / time resource for transmitting the RA preamble sequence may be associated with the CCCH SDU size.
  • the frequency / time resource corresponds to the above RA preamblearesource.
  • the UE transmits an 80-bit CCCHDUSDU message
  • the UE transmits an RA preamble with a frequency / time resource 1 corresponding to 80 bits and transmits a 56-bit CCCH SDU message.
  • Information on the correspondence relationship between CCCH SDU size and RA ⁇ preamble resource is notified from the eNB to the UE by system information or RRC dedicated signaling.
  • the UE holds information on the correspondence relationship, and determines RA preamble resource based on the correspondence relationship and CCCH SDU size of Message 3 to be transmitted.
  • ENB holds the correspondence between CCCH SDU size and RA preamble resource, and based on RA preamble resource received from UE, it can grasp CCCH SDU size that the UE intends to transmit in Message 3. Thereby, the allocation of TBS according to CCCH SDU size can be performed by RA response.
  • the UE starts a random access procedure when, for example, it wishes to transmit the above-mentioned message for resuming connection to the eNB as Message 3.
  • step S301 for example, the UE recognizes that the RA-Preamble has not been explicitly signaled from the eNB, and starts the RA-preamble selection process in the MAC layer.
  • step S302 the UE determines whether the CCCH SDU size of Message 3 to be transmitted is equal to the predetermined message size reported in the system information or individual RRC signaling. That is, it is determined whether or not there is a message size equal to CCCH SDU size in the list of message size in the above correspondence relationship notified in the system information or individual RRC signaling.
  • step S302 determines whether the transmission result in step S302 is Yes.
  • the process proceeds to step S303, and the UE regards the PRACH resource (generally having a plurality of PRACH resources) corresponding to the message size equal to the CCCH size SDU size as a usable PRACH resource.
  • step S305 the UE selects an RA-preamble resource from the available PRACH-resources, and transmits the RA-preamble.
  • step S302 determines whether the determination result in step S302 is No. If the determination result in step S302 is No, the process proceeds to step S304, the conventional PRACH resource notified by the system information or individual RRC signaling is regarded as a usable PRACH resource, and the process proceeds to step S305.
  • FIG. 20 shows a description example (excerpt) of specifications (3GPP TS 36.321, 5.1.1) corresponding to the operation of the UE of the third embodiment.
  • the changed part from Non-Patent Document 2 is underlined.
  • the UE knows a set of usable PRACH resources that are associated with each message size of Message3. This is indicated by prach-ConfigIndex.
  • FIG. 21 shows a description example (extract) of specifications (3GPPGPTS 36.321, 5.1.2) corresponding to the operation of the UE of the third embodiment.
  • 3GPPGPTS 36.321, 5.1.2 specifications
  • changes from Non-Patent Document 2 are underlined.
  • the UE PRACH-ParametersMsgSize is considered a usable PRACH resources. Otherwise, the resource indicated by PRACH-ConfigSIB or PRACH-Config is regarded as usable PRACH resources.
  • FIG. 22 shows a description example (extract) of the specification (3GPP TS 36.331) corresponding to the operation of the UE of the third embodiment.
  • the changed part from Non-Patent Document 5 is underlined.
  • the above MessageSizePrachInfoList, PRACH-ParametersMsgSize, and the like are added to PRACH-Config-information elements. These pieces of information correspond to the information on the correspondence relationship between CCCH SDU size and RA preamble resource described above.
  • Example 4 Next, Example 4 will be described.
  • the UE when the UE resumes the RRC connection (eg, steps S56 to S59 in FIG. 4 and step S80 in FIG. 5), the UE requests a message for resuming at the RRC layer (conventional Msg).
  • a conventional RRC Connection request message (or RRC Connection reestablishment request message) of Msg.3 size (56 bits TBS) is also created.
  • the UE then sends both messages to the lower layer.
  • the UE sends a message requesting resumption of a size larger than that of the conventional Msg.3 according to the allocated TBS, or the conventional Msg.3 size RRCRRconnection request message (or RRC Connection reestablishment request) message).
  • the UE when the UE starts RRC connection resumption in step S56, the UE creates RRC connection request message and RRC connection request message. Then, in the MAC layer, the UE determines whether to transmit either RRC connection resume request message or RRC Connection request message according to the TBS assigned by UL grant received in step S58. For example, when the TBS has a size that allows transmission of RRC connection, resume request, and message, RRC connection, resume request, and message are transmitted. In this case, the procedure shown in FIG. 4 is performed thereafter. On the other hand, when the TBS is not of a size that can transmit RRC connection, request, message, RRC connection, request request message (or RRC connection request request message). In this case, the same procedure as that at the time of transmitting the conventional RRC Connection request message (or RRC Connection reestablishment request message) is subsequently executed.
  • RRC connection resume request message is used as a message for resuming the RRC connection. This may be considered as a new message in FIG. 4 or an extension of an existing message (for example, a message used in step S80 in FIG. 5).
  • step S401 the UE creates an RRC connection request message in the RRC layer and also creates an existing RRC connection request message.
  • step S ⁇ b> 402 the UE determines whether or not it is possible to transmit RRC connection resume request using the TBS assigned to Message 3.
  • step S402 If the determination result in step S402 is Yes, RRC connection resume request message is transmitted in step S403. In the case of No, it is assumed that the TBS is 56 bits, and an existing RRC connection request message is transmitted in step S404.
  • the radio quality is good, a large TBS allocation can be expected, and in that case, an RRC connection connection request message can be transmitted. Even when receiving normal TBS allocation, RRC connection request message can be transmitted. That is, in the RA procedure, it is possible to avoid that the UE cannot transmit the control message due to a lack of uplink resources allocated from the eNB.
  • RRC connection request message and RRC connection resume request message are created at the same time, but a plurality of messages of different sizes are created at the same time, and if large messages can be sent, they are sent.
  • the process is applicable not only to RRC connection request message and RRC connection request request message.
  • Embodiments 1 to 4 can be implemented in combination as long as no contradiction occurs.
  • Each device may have all the functions of the first to fourth embodiments, or may have the function of any one of the first to fourth embodiments or the function of a modified example. Alternatively, any one of the functions of the first to fourth embodiments may be provided. In the following description, each device is assumed to have the functions of the first to fourth embodiments.
  • FIG. 24 shows a functional configuration diagram of the UE.
  • the UE includes a DL signal reception unit 51, a UL signal transmission unit 52, a preamble selection unit 53, an RRC processing unit 54, and a UE context management unit 55.
  • FIG. 24 shows only functional units particularly relevant to the present invention in the UE, and the UE also has a function (not shown) for performing an operation based on LTE.
  • the DL signal receiving unit 51 includes a function of receiving various downlink signals from the base station eNB and acquiring higher layer information from the received physical layer signal, and the UL signal transmitting unit 52 is transmitted from the UE 50. It includes a function of generating various signals of the physical layer from information on higher layers to be transmitted and transmitting the signals to the base station eNB.
  • the preamble selection unit 53 selects a preamble in the MAC layer using the logic described in the first and second embodiments.
  • the preamble selection unit 53 may be provided in the UL signal transmission unit 52. Also, the preamble selection unit 53 performs resource selection for RA preamble transmission in the third embodiment.
  • the RRC processing unit 54 generates and transmits an RRC message (transmission is performed via the UL signal transmission unit 52), interprets the RRC message received by the DL signal reception unit 51, and the like. In the third embodiment, the RRC processing unit 54 acquires / holds correspondence information. In the fourth embodiment, the RRC processing unit 54 simultaneously creates RRC connection request message and RRC connection resume request message. In the fourth embodiment, the UL signal transmission unit 52 includes a function for determining which of RRC connection request message and RRC connection resume request message is to be transmitted based on TBS.
  • the UE context management unit 55 includes storage means such as a memory, and holds the UE context in the RRC hold state / RRC idle state.
  • the configuration of the UE shown in FIG. 24 may be entirely realized by a hardware circuit (eg, one or a plurality of IC chips), or a part is constituted by a hardware circuit, and the other part is a CPU and a program. And may be realized.
  • a hardware circuit eg, one or a plurality of IC chips
  • a part is constituted by a hardware circuit, and the other part is a CPU and a program. And may be realized.
  • FIG. 25 is a diagram illustrating an example of a hardware (HW) configuration of the UE.
  • FIG. 25 shows a configuration closer to the mounting example than FIG.
  • the UE controls a radio equipment (RE) module 151 that performs processing related to a radio signal, a base band (BB) processing module 152 that performs baseband signal processing, and device control that performs processing such as an upper layer.
  • RE radio equipment
  • BB base band
  • device control that performs processing such as an upper layer.
  • It has a module 153 and a USIM slot 154 which is an interface for accessing a USIM card.
  • the RE module 151 should transmit from the antenna by performing digital-to-analog (D / A) conversion, modulation, frequency conversion, power amplification, etc. on the digital baseband signal received from the BB processing module 152 Generate a radio signal.
  • a digital baseband signal is generated by performing frequency conversion, analog to digital (A / D) conversion, demodulation, and the like on the received wireless signal, and the digital baseband signal is passed to the BB processing module 152.
  • the RE module 151 includes functions such as a physical layer in the DL signal receiving unit 51 and the UL signal transmitting unit 52 in FIG. 24, for example.
  • the BB processing module 152 performs processing for mutually converting an IP packet and a digital baseband signal.
  • the digital signal processor (DSP) 162 is a processor that performs signal processing in the BB processing module 152.
  • the memory 172 is used as a work area for the DSP 162.
  • the BB processing module 152 includes, for example, functions such as layer 2 in the DL signal reception unit 51 and the UL signal transmission unit 52 in FIG. 24, a preamble selection unit 53, an RRC processing unit 54, and a UE context management unit 54. Note that all or some of the functions of the preamble selection unit 53, the RRC processing unit 54, and the UE context management unit 54 may be included in the device control module 153.
  • the device control module 153 performs IP layer protocol processing, various application processing, and the like.
  • the processor 163 is a processor that performs processing performed by the device control module 153.
  • the memory 173 is used as a work area for the processor 163.
  • the processor 163 reads and writes data with the USIM through the USIM slot 154.
  • FIG. 26 shows a functional configuration diagram of the eNB.
  • the eNB includes a DL signal transmission unit 11, a UL signal reception unit 12, an RRC processing unit 13, a UE context management unit 14, and an NW communication unit 15.
  • FIG. 26 shows only functional units particularly related to the embodiment of the present invention in the eNB, and the eNB also has a function (not shown) for performing an operation based on at least the LTE scheme.
  • the DL signal transmission unit 11 includes a function of generating and transmitting various physical layer signals from higher layer information to be transmitted from the eNB.
  • the UL signal receiving unit 12 includes a function of receiving various uplink signals from the UE and acquiring higher layer information from the received physical layer signals.
  • the RRC processing unit 13 performs generation / transmission of RRC messages and system information (transmission is transmission via the DL signal transmission unit 11), interpretation of RRC messages received by the UL signal reception unit 12, operation, and the like.
  • the RRC processing unit 13 also includes a function of resuming RRC connection using the UE context held in the UE context management unit 14.
  • the UE context management unit 14 includes storage means such as a memory and holds the UE context in the RRC hold state / RRC idle state.
  • the NW communication unit 15 transmits / receives a control signal to / from the MME through the S1-MME interface, a function to transmit / receive data to / from the S-GW through the S1-U interface, and a function of transmitting a connection maintenance instruction signal , A transmission function for transmitting RRC connection establishment completion, and the like.
  • the configuration of the eNB shown in FIG. 26 may be realized entirely by a hardware circuit (eg, one or a plurality of IC chips), or a part may be configured by a hardware circuit, and the other part may be a CPU and a program. And may be realized.
  • a hardware circuit eg, one or a plurality of IC chips
  • a part may be configured by a hardware circuit, and the other part may be a CPU and a program. And may be realized.
  • FIG. 27 is a diagram illustrating an example of a hardware (HW) configuration of the eNB.
  • HW hardware
  • FIG. 27 shows a configuration closer to the mounting example than FIG.
  • the eNB is connected to the network by an RE module 251 that performs processing related to a radio signal, a BB processing module 252 that performs baseband signal processing, a device control module 253 that performs processing such as an upper layer, and the like.
  • a communication IF 254 which is an interface for the
  • the RE module 251 generates a radio signal to be transmitted from the antenna by performing D / A conversion, modulation, frequency conversion, power amplification, and the like on the digital baseband signal received from the BB processing module 252.
  • a digital baseband signal is generated by performing frequency conversion, A / D conversion, demodulation, and the like on the received radio signal, and passed to the BB processing module 252.
  • the RE module 251 includes functions such as a physical layer in the DL signal transmission unit 11 and the UL signal reception unit 12 in FIG. 26, for example.
  • the BB processing module 252 performs processing for mutually converting an IP packet and a digital baseband signal.
  • the DSP 262 is a processor that performs signal processing in the BB processing module 252.
  • the memory 272 is used as a work area for the DSP 252.
  • the BB processing module 252 includes, for example, functions such as layer 2 in the DL signal transmission unit 11 and the UL signal reception unit 12 in FIG. 25, an RRC processing unit 13, and a UE context management unit 14. Note that all or part of the functions of the RRC processing unit 13 and the UE context management unit 14 may be included in the device control module 253.
  • the device control module 253 performs IP layer protocol processing, OAM processing, and the like.
  • the processor 263 is a processor that performs processing performed by the device control module 253.
  • the memory 273 is used as a work area for the processor 263.
  • the auxiliary storage device 283 is an HDD, for example, and stores various setting information for the base station eNB itself to operate.
  • the configuration (functional category) of the apparatus shown in FIGS. 24 to 27 is merely an example of a configuration that realizes the processing described in the present embodiment.
  • the mounting method (specific arrangement of functional units, names, and the like) is not limited to a specific mounting method.
  • the size of a message transmitted on a predetermined logical channel in the user apparatus that communicates with the base station in a wireless communication system including the base station and the user apparatus. And selecting a random access signal group from a plurality of random access signal groups and selecting a random access signal from the random access signal group, and selecting by the selection unit.
  • a user equipment characterized by transmitting on a channel is provided.
  • the base station can grasp the size of the message to be transmitted by the user apparatus before transmitting the RA response, and can allocate an appropriate TBS with the UL response grant. Therefore, it is possible to prevent the user apparatus from being unable to transmit a control message due to a shortage of uplink resources allocated from the base station.
  • the selection unit may select a random access signal group corresponding to the predetermined threshold from two random access signal groups. With this configuration, for example, it is possible to notify the base station that the user apparatus uses a new CCCH SDU size using the existing Group B.
  • the selection unit may select a random access signal group corresponding to the predetermined threshold from a plurality of random access signal groups.
  • a random access signal group corresponding to the predetermined threshold is, for example, messageSizeGroupC.
  • the selection unit selects the predetermined value from a plurality of random access signal groups. It is also possible to select a predetermined random access signal group different from the random access signal group corresponding to the threshold value. With this configuration, for example, it is possible to notify the base station that the user apparatus uses a message larger than messageSizeGroupC using the existing Group B.
  • the selection unit determines whether or not a first condition that a size of the message is larger than the predetermined threshold and a path loss is smaller than a predetermined value is satisfied, and the first condition is not satisfied And determining whether or not a second condition that the size of the message is equal to the predetermined threshold is satisfied, and selecting the random access signal group corresponding to the predetermined threshold when the second condition is satisfied It is good to do.
  • a first condition that a size of the message is larger than the predetermined threshold and a path loss is smaller than a predetermined value is satisfied and the first condition is not satisfied
  • determining whether or not a second condition that the size of the message is equal to the predetermined threshold is satisfied and selecting the random access signal group corresponding to the predetermined threshold when the second condition is satisfied It is good to do.
  • the selection unit when the second condition is not satisfied, the selection unit, the size of the message is smaller than the predetermined threshold, and the size of the message is larger than a predetermined second threshold, it is determined whether or not a third condition that a path loss is smaller than a predetermined value is satisfied, and when the third condition is satisfied, the selection unit determines that the predetermined second threshold value and the predetermined value Selecting a random access signal group corresponding to a size between the threshold and the selection unit selecting a random access signal group corresponding to the predetermined second threshold when the third condition is not satisfied; It is good.
  • the message size can be divided into a plurality of patterns, and notification to the base station can be performed for each pattern.
  • the user apparatus in the radio communication system including a base station and a user apparatus, the user apparatus that communicates with the base station, the size of a message transmitted on a predetermined logical channel, and a random access signal
  • a receiving unit that receives information on a correspondence relationship between the resource and the resource from the base station, and a selection unit that selects a resource corresponding to the size of a message transmitted on the predetermined logical channel from the correspondence information.
  • a user apparatus comprising: a transmission unit that transmits a random access signal to the base station using the selected resource is provided.
  • the base station can grasp the size of the message to be transmitted by the user apparatus before transmitting the RA response, and can allocate an appropriate TBS with the UL response grant. Therefore, it is possible to prevent the user apparatus from being unable to transmit a control message due to a shortage of uplink resources allocated from the base station.
  • the resource is, for example, a random access signal sequence or a resource of time and frequency used for transmission of the random access signal.
  • the resource is, for example, a random access signal sequence or a resource of time and frequency used for transmission of the random access signal.
  • a random access method executed by the user apparatus that communicates with the base station in a wireless communication system including the base station and the user apparatus, and a message transmitted on a predetermined logical channel.
  • a random access signal group from a plurality of random access signal groups by comparing the size and a predetermined threshold, and selecting a random access signal from the random access signal group; and A transmitting step of transmitting the selected random access signal to the base station; and a transmitting step of transmitting the message on the predetermined logical channel using a resource allocated by a response from the base station to the random access signal. Random access with Scan method is provided.
  • a random access method executed by the user apparatus that communicates with the base station in a wireless communication system including the base station and the user apparatus, and a message transmitted on a predetermined logical channel.
  • a random access method comprising a selection step of selecting from the above and a transmission step of transmitting a random access signal to the base station using the selected resource.
  • the user apparatus that communicates with the base station in a wireless communication system including a base station and a user apparatus, the first message and a size smaller than the first message A generating unit that generates a second message, and the first message when the first message can be transmitted according to the amount of resources allocated by a response from the base station to the random access signal transmitted to the base station.
  • a user apparatus comprising: a transmission unit that transmits one message to the base station and transmits the second message to the base station when the first message cannot be transmitted.
  • the operations of a plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components.
  • each device has been described using a functional block diagram. However, such a device may be implemented in hardware, software, or a combination thereof.
  • Software that is operated by the processor of the apparatus according to the embodiment of the present invention includes random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD It may be stored in any suitable storage medium such as ROM, database, server, etc.
  • notification of information is not limited to the aspect / embodiment described in this specification, and may be performed by other methods.
  • notification of information includes physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (for example, RRC signaling, MAC signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB))), other signals, or a combination thereof.
  • the RRC message may be referred to as RRC signaling.
  • the RRC message may be, for example, an RRC connection setup (RRCRRConnection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
  • each aspect / embodiment described in this specification includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G, 5G, Future Radio Access (FRA), W -CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Ultra-WideBand (UWB) ), Bluetooth (registered trademark), other appropriate systems, and / or next-generation systems extended based on these systems.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • SUPER 3G IMT-Advanced
  • 4G Fifth Generation
  • FAA Future Radio Access
  • W -CDMA registered trademark
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access 2000
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Ultra-Wide
  • the determination or determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true value (Boolean: true or false), or may be performed by comparing numerical values (for example, (Comparison with a predetermined value).
  • the channel and / or symbol may be a signal.
  • the signal may be a message.
  • UE is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal by those skilled in the art , Remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.
  • notification of predetermined information is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.
  • determining may encompass a wide variety of actions.
  • “Judgment”, “decision” can be, for example, calculating, computing, processing, deriving, investigating, looking up (eg, table, database or another (Searching in the data structure), and confirming (ascertaining) what has been confirmed may be considered as “determining” or “determining”.
  • “determination” and “determination” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (accessing) (e.g., accessing data in a memory) may be considered as “determined” or "determined”.
  • determination and “decision” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “deciding”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.
  • the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • the input / output information or the like may be stored in a specific place (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.
  • the notification of the predetermined information is not limited to explicitly performed, and may be performed implicitly (for example, notification of the predetermined information is not performed). .
  • information, parameters, and the like described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by other corresponding information.
  • the radio resource may be indicated by an index.
  • the names used for the parameters described above are not limiting in any way.

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Abstract

L'invention concerne un dispositif utilisateur utilisé pour communiquer avec une station de base dans un système de communication sans fil comprenant la station de base et le dispositif utilisateur. Le dispositif utilisateur comprend : une unité de sélection pour sélectionner un groupe de signaux d'accès aléatoire parmi une pluralité de groupes de signaux d'accès aléatoire en comparant la taille d'un message transmis sur un canal logique prescrit à une valeur de seuil prescrite, et en sélectionnant un signal d'accès aléatoire dans le groupe de signaux d'accès aléatoire ; et une unité de transmission pour transmettre le signal d'accès aléatoire sélectionné par l'unité de sélection à la station de base, l'unité de transmission transmettant le message sur le canal logique prescrit au moyen d'une ressource attribuée par une réponse de la station de base au signal d'accès aléatoire.
PCT/JP2017/008083 2016-03-04 2017-03-01 Équipement utilisateur et procédé d'accès aléatoire WO2017150601A1 (fr)

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CN201780003687.6A CN108141890B (zh) 2016-03-04 2017-03-01 用户装置、以及随机接入方法
EP17760065.7A EP3425989B1 (fr) 2016-03-04 2017-03-01 Équipement utilisateur et procédé d'accès aléatoire
US15/767,300 US10660135B2 (en) 2016-03-04 2017-03-01 User equipment and random access method

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN108702762A (zh) * 2018-05-18 2018-10-23 北京小米移动软件有限公司 消息发送方法、装置和资源分配方法、装置
CN113767705A (zh) * 2019-05-02 2021-12-07 株式会社Ntt都科摩 用户装置及基站装置
US11737145B2 (en) * 2017-11-28 2023-08-22 Nokia Technologies Oy Early data transmission determinations using an uplink grant

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012525083A (ja) * 2009-04-23 2012-10-18 インターデイジタル パテント ホールディングス インコーポレイテッド マルチキャリアワイヤレス通信におけるランダムアクセスのための方法および機器
WO2013129374A1 (fr) * 2012-03-02 2013-09-06 シャープ株式会社 Dispositif de station mobile, dispositif de station de base, procédé de communication, circuit intégré, et système de communication sans fil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012525083A (ja) * 2009-04-23 2012-10-18 インターデイジタル パテント ホールディングス インコーポレイテッド マルチキャリアワイヤレス通信におけるランダムアクセスのための方法および機器
WO2013129374A1 (fr) * 2012-03-02 2013-09-06 シャープ株式会社 Dispositif de station mobile, dispositif de station de base, procédé de communication, circuit intégré, et système de communication sans fil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NTT DOCOMO, INC.: "RA preamble partitioning for multiple CCCH SDU sizes", 3GPP TSG-RAN WG2 #94 R2-163368, 13 May 2016 (2016-05-13), XP051095810 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11737145B2 (en) * 2017-11-28 2023-08-22 Nokia Technologies Oy Early data transmission determinations using an uplink grant
CN108702762A (zh) * 2018-05-18 2018-10-23 北京小米移动软件有限公司 消息发送方法、装置和资源分配方法、装置
CN113767705A (zh) * 2019-05-02 2021-12-07 株式会社Ntt都科摩 用户装置及基站装置

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