WO2019216367A1 - Dispositif de station mobile - Google Patents

Dispositif de station mobile Download PDF

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Publication number
WO2019216367A1
WO2019216367A1 PCT/JP2019/018510 JP2019018510W WO2019216367A1 WO 2019216367 A1 WO2019216367 A1 WO 2019216367A1 JP 2019018510 W JP2019018510 W JP 2019018510W WO 2019216367 A1 WO2019216367 A1 WO 2019216367A1
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WO
WIPO (PCT)
Prior art keywords
scheduling request
uplink
mobile station
station apparatus
uplink grant
Prior art date
Application number
PCT/JP2019/018510
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English (en)
Japanese (ja)
Inventor
佐藤　聖二
淳悟 後藤
中村　理
山田　昇平
泰弘 浜口
Original Assignee
シャープ株式会社
鴻穎創新有限公司
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Publication date
Application filed by シャープ株式会社, 鴻穎創新有限公司 filed Critical シャープ株式会社
Publication of WO2019216367A1 publication Critical patent/WO2019216367A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/02—Hybrid access
    • 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 mobile station apparatus.
  • This application claims priority based on Japanese Patent Application No. 2018-91539 for which it applied to Japan on May 10, 2018, and uses the content here.
  • Evolved Universal Radio Access also called “EUTRA” or “LTE”
  • LTE-A Advanced EUTRA
  • NR New Radio
  • SPS semi-persistent scheduling
  • uplink grant free that enables uplink data transmission from the mobile station apparatus to the base station apparatus even when there is no uplink grant allocated from the base station apparatus to the mobile station apparatus by applying uplink SPS.
  • Investigation and specification standardization are also progressing for a communication method using (GF: Grant Free).
  • an object of the present invention is to provide a mobile station apparatus and a communication method that can reduce communication delay.
  • the present invention has been made to solve the above-described problem, and is a mobile station apparatus of a communication system including at least a base station apparatus and a mobile station apparatus according to an aspect of the present invention, wherein a scheduling request is transmitted to the scheduling request.
  • a transmission unit that transmits to the base station apparatus using a physical uplink control channel set for a request, a scheduling request transmission number counter unit that counts the number of scheduling request transmissions, and the number of transmissions of the scheduling request is RRC
  • the mobile station apparatus is the mobile station apparatus described above, wherein the control unit has reached a scheduling request maximum transmission count set by RRC, and When a scheduling request transmission opportunity occurs, all configured uplink grant types 1 configured in all serving cells are suspended, and configured and suspended in the serving cell when the random access procedure is successful. Reinitialize all the configured uplink grant type 1s.
  • the mobile station apparatus is the mobile station apparatus described above, wherein the control unit has reached a scheduling request maximum transmission count set by RRC, and When a scheduling request transmission opportunity occurs, the configured uplink grant type 1 configured in the serving cell related to transmission of the scheduling request is suspended, and when the random access procedure is successful, the serving cell is configured and suspended.
  • the configured uplink grant type 1 being re-initialized.
  • the mobile station apparatus by 1 aspect of this invention is said mobile station apparatus, Comprising:
  • the said control part sets several uplink BWP to the said serving cell, and comprises for every said several uplink BWP. If the configured uplink grant type 1 configured is suspended, the configured uplink configured and suspended in the uplink BWP that becomes active when the random access procedure on the special cell is successful Reinitialize link grant type 1.
  • the mobile station apparatus is the above mobile station apparatus, wherein the control unit has reached a scheduling request maximum transmission count set by RRC, and When a scheduling request transmission opportunity occurs, all the configured uplink grant types 1 configured in all serving cells included in the TAG to which the serving cell related to the scheduling request belongs are suspended, and the random access procedure is successful. If so, re-initialize all configured uplink grant type 1 configured and suspended in all serving cells included in the TAG.
  • a mobile station apparatus of a communication system including at least a base station apparatus and a mobile station apparatus according to an aspect of the present invention, wherein a scheduling request is used using a physical uplink control channel set for the scheduling request.
  • the mobile station apparatus by 1 aspect of this invention is said mobile station apparatus, Comprising:
  • the said control part uses the comprised uplink grant type 1 comprised by the serving cell which concerns on transmission of the said scheduling request. Clear and notify the RRC of the configured uplink grant type 1 release configured in the serving cell.
  • the mobile station apparatus by 1 aspect of this invention is said mobile station apparatus, Comprising:
  • the said control part clears the comprised uplink grant type 1 comprised by the active uplink BWP of the said serving cell. Then, the RRC is notified of the release of the configured uplink grant type 1 configured in the active uplink BWP.
  • a mobile station apparatus is the mobile station apparatus described above, wherein the control unit is configured uplink grant configured in all serving cells included in a TAG to which the serving cell belongs. Clear type 1 and notify RRC of the release of configured uplink grant type 1 configured in all serving cells included in the TAG.
  • the mobile station apparatus is the mobile station apparatus described above, wherein the control unit has reached the scheduling request transmission opportunity when the scheduling request transmission count reaches the scheduling request maximum transmission count. Occurs, the uplink data transmission according to the configured uplink grant type 1 is stopped.
  • communication delay can be reduced even when uplink resynchronization establishment processing occurs due to exceeding the maximum number of uplink scheduling request transmissions during GF communication.
  • GF and SPS cell activation / deactivation
  • BWP Bandwidth Part
  • the uplink grant of dynamic scheduling is called dynamic grant, whereas the uplink grant of SPS and GF of uplink is configured in the sense that transmission is permitted with a transmission physical resource having a predetermined configuration. Sometimes referred to as a configured grant or a configured uplink grant.
  • reception is performed using a physical resource for reception that has been assigned in advance, so that it is referred to as a configured assignment or a configured downlink assignment. Sometimes it is done.
  • the uplink SPS, GF, and downlink SPS are collectively referred to as “Transmission / Reception without dynamic scheduling”, and the downlink SPS is referred to as “DL-SPS”,
  • the specification standardization is proceeding in directions in which SPSs are referred to as “configured grant type 1” and “configured grant type 2”, respectively.
  • Configured grant type 1 will be described as GF
  • Configured grant type 2 as UL-SPS
  • downlink SPS as DL-SPS.
  • Activation of the GF is performed by assigning periodic physical channel resources and transmission start timing offset from higher layers such as RRC (Radio Resource Control), the number of HARQ (Hybrid Automatic Repeat Request) processes, and CS-RNTI (Configured SchedulingRoundTwoundRoundRoundRoundRoundRoundRoundRoundRoundRoundRound Identification) is set, the setting is saved, and the configured uplink grant is initialized at the set transmission start timing.
  • RRC Radio Resource Control
  • HARQ Hybrid Automatic Repeat Request
  • CS-RNTI Configured SchedulingRoundTwoundRoundRoundRoundRoundRoundRoundRoundRoundRoundRound Identification
  • the GF configured in the serving cell or the BWP to be described later stops transmission while retaining the setting information from the RRC by a deactive transition of the serving cell to be described later or an inactive transition of the BWP. This is called suspend.
  • the GF in the suspended state is reinitialized by the active transition of the next serving cell or the active transition of the BWP, and can be transmitted again.
  • the configuration of the UL-SPS is cleared by the active transition of the serving cell or the inactive transition of the BWP, and the activation by the DCI is not performed even if the active transition of the serving cell or the active transition of the BWP is subsequently performed. As long as you can not send.
  • Cell activation / deactivation In LTE and LTE-A, setting of UL-SPS and DL-SPS was permitted only on the primary cell (PCell) and primary secondary cell (PSCell) called special cells (SpCell). In the 5th generation communication system specification, DL-SPS, UL-SPS, and GF can be set also on the secondary cell (SCell).
  • SCell SCell Activation / Deactivation MAC Control Element (CE) transmitted from the base station device to the mobile station device.
  • CE SCell Activation / Deactivation MAC Control Element
  • an sCell deactivation timer (sCellDeactivationTimer) is set in each secondary cell.
  • the sCell deactivation timer is activated or reactivated when an SCell Activation / Deactivation MAC CE instructing activation or deactivation of the secondary cell is received from the base station apparatus.
  • an uplink grant or downlink assignment is received by a PDCCH (Physical Downlink Control Channel) of the secondary cell, or when an uplink grant or downlink related to the secondary cell is received by the PDCCH of another serving cell. It will also be restarted when an assignment is received.
  • PDCCH Physical Downlink Control Channel
  • the secondary cell in which the sCell deactivation timer is set is deactivated, and until the next activation, the control signal and data transmission on the uplink, and the control signal on the downlink And no data is received.
  • the sCell deactivation timer When deactivation is instructed by the activation / deactivation MAC CE for the secondary cell associated with the active sCell deactivation timer, or when release by RRC is performed, the sCell deactivation timer To stop.
  • BWP switching A technique of dividing a physical resource on a serving cell into a plurality of frequency bands and switching each frequency band for use is called BWP (Bandwidth Part).
  • BWP inactivity timer bandwidthPartInactivityTimer
  • GF is configured in the uplink BWP in the active state, and when the uplink BWP is changed to inactive by the switch, the GF is suspended, and the GF suspended when the uplink BWP is activated next time is Reinitialized and activated.
  • Uplink timing adjustment Serving cells having the same uplink physical channel transmission timing (hereinafter abbreviated as uplink timing) can be managed by grouping called TAG (Timing Advance Group).
  • TAG Timing Advance Group
  • the TAG is classified into PTAG (Primary TAG) including one SpCell and STAG (Secondary TAG) not including SpCell. Which serving cell belongs to which TAG depends on the setting of RRC.
  • the uplink timing is adjusted by a TA command (Timing Advance Command) MAC CE transmitted from the base station apparatus.
  • the TAG command MAC CE includes a TAG identifier (TAG-id) and an index indicating an uplink timing adjustment value, and uplink timings of all serving cells belonging to the TAG indicated by the TAG identifier are indicated by the index. It is adjusted with the timing adjustment value.
  • the status of uplink timing adjustment is monitored using an uplink timing adjustment timer (timeAlignmentTimer).
  • the uplink timing adjustment timer is associated with each TAG.
  • the uplink timing adjustment timer that has been started or restarted operates until it is stopped or expires after the time indicated by the initial value has elapsed.
  • the uplink timing adjustment timer is in operation, if the TA command MAC CE for the TAG associated with the uplink timing adjustment timer is not received and the uplink timing adjustment timer expires thereafter, all serving cells belonging to the TAG are It is determined that the link is out of synchronization, all uplink transmissions in all serving cells belonging to the TAG are stopped, and uplink resynchronization establishment processing is performed.
  • the uplink timing adjustment timer associated with the PTAG expires, not only the PTAG but also the uplink timing adjustment timers associated with all other STAGs expire, and all TAGs Re-synchronization establishment of the serving cell to which it belongs is performed.
  • the mobile station apparatus has a scheduling request (Scheduling Request) when there is uplink data to be transmitted and there is no UL-SCH (Uplink Shared Channel) resource to be used for uplink data transmission.
  • SR Uplink Shared Channel
  • the SR is transmitted using communication resources configured for SR transmission on a PUCCH (Physical Uplink Control Channel).
  • PUCCH Physical Uplink Control Channel
  • the PUCCH resource for SR transmission and the UL-SCH resource allocated to other uplink data transmission, or a gap set for downlink communication quality measurement (uplink transmission impossible), etc. overlap May not be transmitted and may be postponed until the next SR transmission opportunity.
  • the SR transmission prohibit timer is started.
  • the SR transmission prohibition timer is activated, SR transmission is not performed even at the SR transmission opportunity.
  • the SR is transmitted at each SR transmission opportunity until an uplink grant including UL-SCH resource allocation is received from the base station apparatus.
  • the maximum number of transmissions is set in advance by RRC for the number of transmissions of SR. This is called the SR maximum transmission count (sr-TransMax).
  • the SR transmission number counter (SR_COUNTER) is set to 0, and the SR transmission number counter is incremented each time SR is transmitted. Then, SR transmission is performed until the value of the SR transmission number counter reaches the SR maximum transmission number, and thereafter, an uplink grant including UL-SCH resource allocation is not received from the base station apparatus, and the next SR transmission opportunity is received.
  • the uplink transmission in all the serving cells is stopped, the random access procedure mentioned later on SpCell is started, and an uplink synchronization re-establishment process is performed.
  • RA Random access
  • RA procedure Uplink synchronization is established according to a random access (RA) procedure.
  • the RA procedure includes a contention based RA procedure and a non-contention based RA procedure.
  • RA random access
  • Step 1 Random access (RA) preamble transmission
  • the mobile station apparatus selects an RA preamble from a plurality of predetermined RA preamble sequence groups and transmits it to the base station apparatus.
  • the base station device selects one RA preamble that is not used by other mobile station devices from the RA preamble sequence group that is not used in the contention based RA procedure, and the mobile station device is preliminarily transmitted through the PDCCH or the like.
  • the mobile station apparatus uses and transmits the information notified to.
  • Step 2 Random access response (RAR) reception
  • RAR random access response
  • the mobile station apparatus waits for reception of a random access response (RAR) from the base station apparatus.
  • RAR random access response
  • the RAR is checked whether the RA preamble index included in the RAR is the same as the RA preamble index transmitted by the mobile station apparatus. If the index is the same, the uplink timing adjustment is performed according to the timing advance command MAC CE included in the RAR. Apply.
  • the RA procedure is completed at this point, and uplink synchronization is established.
  • the process proceeds to the next procedure in order to resolve the contention.
  • Step 3 Uplink data transmission
  • the mobile station apparatus uniquely identifies the mobile station apparatus according to uplink transmission scheduling information included in the RAR (such as an identifier or C-RNTI in an upper layer), and an upper layer message. Etc. are transmitted to the base station apparatus.
  • Step 4 Conflict resolution Conflict is resolved by receiving a message including information for uniquely identifying the mobile station apparatus transmitted in Step 3 or receiving DCI addressed to C-RNTI transmitted in Step 3 through PDCCH.
  • the contention-based RA procedure is completed and uplink synchronization is established.
  • FIG. 1 is an example of a configuration of a MAC entity in a mobile station apparatus in the present embodiment.
  • reference numeral 101 denotes a control unit that controls all the components.
  • An upper layer interface unit 102 sets and manages logical channels with upper layers such as PDCP, RLC, and RRC, and transmits and receives uplink data and downlink data through the logical channel.
  • Reference numeral 103 denotes an uplink PDU (Protocol Data Unit) component, which configures an uplink PDU by adding a header to the uplink transmission data from the upper layer received through the logical channel, combining data of a plurality of logical channels, and the like. To do.
  • a transmission processing unit 104 performs error correction coding processing, modulation processing, and the like on the uplink PDU created by the uplink PDU configuration unit 103, and performs uplink data, SR, and the like according to an instruction from the uplink resource management unit 106.
  • the uplink control information is mapped to the uplink physical resource.
  • Reference numeral 105 denotes an SR transmission number counter, which counts the number of SR transmissions.
  • the uplink resource management unit 106 manages uplink physical resources allocated from the base station apparatus, controls the mapping between uplink PDUs and uplink physical resources, and controls and manages SR transmission.
  • the reception processing unit 107 demodulates the received signal from the radio interface unit 109 and decodes the error correction code to reconstruct the downlink PDU.
  • the downlink PDU demultiplexing unit 108 demultiplexes the downlink PDU received from the reception processing unit 107 into one or a plurality of data, and sends user data and control data to the upper layer via the upper layer interface unit 102, and CE ( Control Element) data is sent to the control unit 101.
  • a downlink resource management unit 110 manages downlink physical resources allocated from the base station apparatus.
  • the radio interface unit 109 transmits and receives radio signals to and from the base station apparatus.
  • the mobile station apparatus is normally connected to the base station apparatus, and GF is also activated.
  • uplink data to be transmitted is generated, and transmission of SR for requesting the base station apparatus to allocate UL-SCH resource for transmission of the uplink data is triggered.
  • an SR transmission opportunity occurs, and the first SR transmission is performed to the base station apparatus (message m201).
  • the second SR transmission is performed to the base station apparatus (message m202).
  • Tmax SR transmission is performed at the SR transmission opportunity at time t10 (message m210).
  • Tmax is the SR maximum transmission count (sr-TransMax) preset by RRC.
  • uplink resynchronization establishment processing by the RA procedure is started between the mobile station device and the base station device (message m211).
  • the RA procedure is completed at time t20 and uplink synchronization is reestablished, all GFs configured and suspended in all serving cells are reinitialized and transmission is resumed in an active state.
  • the completion of the RA procedure at time t20 is, as described above, when the contention resolution of step 4 is completed in the case of the contention-based RA procedure, and when the RAR is received in step 2 in the case of the non-contention-based RA procedure.
  • the GF suspend due to exceeding the maximum SR transmission count and the re-initialization of the suspended GF performed after the uplink synchronization re-establishment processing may be performed for the GFs configured in all serving cells. , It may be performed only for the serving cell in which the SR maximum transmission count exceeds.
  • the GF suspend due to the excess of the maximum SR transmission count is applied to the GFs configured on the active uplink BWPs of all the serving cells. Alternatively, it may be performed only for the GF configured on the active uplink BWP of the serving cell in which the SR maximum transmission count excess has occurred.
  • the reinitialization of the suspended GF after the uplink synchronization re-establishment processing is performed on the suspended GF configured on the uplink BWP that is active at the time of uplink synchronization re-establishment. Also good. Further, when a plurality of TAGs are configured, after suspending the GF configured in the serving cell belonging to the TAG in which the SR maximum number of transmissions has been exceeded, and performing uplink synchronization re-establishment processing for the TAG, the TAG The GF configured and suspended in the serving cell belonging to may be reinitialized.
  • transmission / reception suspension of GF, UL-SPS and DL-SPS caused by exceeding the maximum SR transmission count and RRC Release notification may be performed for GF and UL-SPS configured on the active uplink BWP of all serving cells, and DL-SPS configured on the active downlink BWP, or SR maximum transmission It may be performed only for GF, UL-SPS configured on the active uplink BWP of the serving cell in which the number of times has exceeded, and DL-SPS configured on the active downlink BWP.
  • the uplink GF when a plurality of TAGs are configured, stop transmission / reception of GF, UL-SPS and DL-SPS configured in the serving cell belonging to the TAG in which the maximum number of SR transmissions has occurred, and notify the RRC of release. Also good.
  • the uplink GF when the next SR transmission opportunity occurs without receiving the uplink grant from the base station apparatus even when the SR transmission count reaches the SR maximum transmission count, the uplink GF Alternatively, the transmission of UL-SPS may be stopped and the release notification to the RRC may be performed, and the downlink DL-SPS reception stop and the release notification to the RRC may not be performed.
  • the uplink grant from the base station apparatus is not received and the next SR transmission opportunity occurs, so that the cell is configured as a serving cell.
  • the GF, UL-SPS, and DL-SPS configurations may be cleared.
  • the communication system, base station apparatus, mobile station apparatus, and communication method to which the present invention is applied are not limited to the 3GPP fifth generation communication standard (NR), but are applied to communication standards used in other communication systems. Also good.
  • NR fifth generation communication standard
  • a program for realizing all or part of the functions of the mobile station apparatus and base station apparatus described above is recorded on a computer-readable recording medium, and the program recorded on the recording medium is stored in a computer system.
  • the processing of each unit may be performed by reading and executing.
  • the “computer system” here includes an OS and hardware such as peripheral devices.
  • the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
  • the “computer-readable recording medium” means a storage device such as a flexible disk, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are included.
  • the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
  • the functions of the mobile station device and the base station device may be integrated into an integrated circuit.
  • Each functional block may be individually formed as a chip, or a part or all of them may be integrated into a chip.
  • the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
  • an integrated circuit based on the technology can also be used.
  • the present invention is suitable for use in wired and wireless communication systems and communication devices.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Pendant une communication GF, si un processus de rétablissement de synchronisation de liaison montante se produit en raison d'un excès du nombre maximal de transmissions SR de liaison montante, des problèmes tels qu'un retard de communication peuvent se produire. L'invention concerne un dispositif de station mobile dans un système de communication comprenant au moins un dispositif de station de base et le dispositif de station mobile comprend : une unité de transmission qui transmet une SR au dispositif de station de base à l'aide d'un ensemble de canaux de commande de liaison montante physique pour la SR ; un nombre de compteurs de transmissions de SR qui compte le nombre de transmissions de la SR ; et une unité de commande qui, si le nombre de transmissions de la SR a atteint un nombre maximal de transmissions SR défini par une RRC, et lors de la survenance d'une opportunité de transmission SR, suspend tous les types d'autorisation de liaison montante configurés 1 configurés dans une cellule de desserte, et, si une procédure RA est démarrée sur une SpCell et que la procédure RA est réussie, réinitialise tous les types d'autorisations de liaison montante configurés 1 configurés et suspendus dans la cellule de desserte.
PCT/JP2019/018510 2018-05-10 2019-05-09 Dispositif de station mobile WO2019216367A1 (fr)

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JP2018091539A JP2019198012A (ja) 2018-05-10 2018-05-10 通信システムおよび通信装置
JP2018-091539 2018-05-10

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017515425A (ja) * 2014-05-09 2017-06-08 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． 送信モード変換方法および装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017515425A (ja) * 2014-05-09 2017-06-08 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． 送信モード変換方法および装置

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Title
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Medium Access Control (MAC) protocol specification (Release 15)", 3GPP TS 38.321, no. V15.1.0, 2 April 2018 (2018-04-02), pages 30 - 43, XP051450732, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Specs/archive/38_series/38.321/38321-f10.zip> [retrieved on 20190717] *

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