WO2021189307A1 - Procédés et appareil de notification de planification et de modification d'informations de commande pour service de diffusion/multidiffusion - Google Patents

Procédés et appareil de notification de planification et de modification d'informations de commande pour service de diffusion/multidiffusion Download PDF

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Publication number
WO2021189307A1
WO2021189307A1 PCT/CN2020/081157 CN2020081157W WO2021189307A1 WO 2021189307 A1 WO2021189307 A1 WO 2021189307A1 CN 2020081157 W CN2020081157 W CN 2020081157W WO 2021189307 A1 WO2021189307 A1 WO 2021189307A1
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WO
WIPO (PCT)
Prior art keywords
mcch
mbs
notification
cycle
service
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Application number
PCT/CN2020/081157
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English (en)
Inventor
Xuelong Wang
Original Assignee
Mediatek Singapore Pte. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Mediatek Singapore Pte. Ltd. filed Critical Mediatek Singapore Pte. Ltd.
Priority to PCT/CN2020/081157 priority Critical patent/WO2021189307A1/fr
Priority to PCT/CN2021/082965 priority patent/WO2021190596A1/fr
Publication of WO2021189307A1 publication Critical patent/WO2021189307A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the traditional MBMS control information is carried by MCCH logical channel.
  • the MCCH is transmitted with a fixed Repetition Period within a Modification Period.
  • the MCCH is repeated at each Repetition Period within a Modification Period.
  • the Modification Period is a multiple of the Repetition Period. Changes in MCCH information is only performed at the boundary of Modification Period and is not performed in the middle of a modification period.
  • the notification used to announce changes of SC-MCCH for the ongoing service is sent in the DCI with G-RNTI scheduling SC-MTCH.
  • the UE receives the notification, it acquires the SC-MCCH in the next modification period.
  • NR Broadcast and Multicast Services In Dec 2019, 3GPP approved a work item (WI) on the support of NR Broadcast and Multicast Services.
  • the application of NR Broadcast and Multicast technology includes V2X use case, public safety usage, video streaming transmission, software upgrade, etc.
  • Figure 6 illustrates an exemplary repeated MCCH transmission and/or modification notification within an NR MBS DRX cycle, in accordance with certain aspects of the present disclosure.
  • NR multicast is transmitted in the coverage of a cell.
  • the MCCH i.e. multicast control channel
  • MTCH i.e. multicast traffic channel
  • the scheduling for NR multicast is done by the gNB.
  • MCCH provides the information of a list of NR multicast services with ongoing sessions transmitted on MTCH (s) .
  • MTCH is scheduled by gNB in the common search space of PDCCH with G-RNTI scrambled.
  • UE decodes the MTCH data for a multicast session in the multicast PDSCH according to the resource indicated by DCI.
  • the definition of fixed Repetition Period and Modification Period for MCCH and MCCH change notification was specified to support the TV based broadcast transmission in 3GPP.
  • the fixed timing for transmission of MCCH is not flexible, since all MTCHs and all UEs shares one MCCH repetition period and Modification period.
  • One notification or MCCH change will cause all UEs to read the MCCH information.
  • the NR multicast and broadcast service (i.e. MBS) mechanism is supposed to support a variety of applications such as V2X application, public safety, video streaming, software update, etc.
  • fixed Repetition Period and Modification Period can not cater for the scheduling and notification requirements of all of the services.
  • MCCH notification cycle is equivalent of the MBMS MCCH modification period defined by UTRAN and EUTRAN. From terminology perspective, MCCH notification cycle can be named as MCCH modification cycle or MCCH modification period.
  • the length of a MCCH notification cycle means the shortest cycle when the MCCH modification notification can be transmitted to the UE.
  • the length of a MCCH notification cycle also means how often the UE needs to monitor PDCCH occasion for check if there is updated MCCH information.
  • a long MCCH notification cycle can be configured.
  • the longest MCCH notification cycle within a cell is the configured MBS DRX cycle.
  • a short MCCH notification cycle can be configured.
  • a Scaling Factor (SF, which is an integer) is defined to calculate the exact length of MCCH notification cycle.
  • the configured MBS DRX cycle e.g. expressed by MBS-DRX-cycle
  • a configured Scaling Factor e.g. expressed by Scaling-Factor
  • the notification of a MBS service and the transmission of the actual control information of the MBS service is repeated once or a plural of times in order to allow UEs missing the first reception to receive them in the follow-up Notification Frames within the configured MCCH notification cycle.
  • Figure 6 illustrates an exemplary repeated MCCH transmission and/or modification notification within an NR MBS DRX cycle, in accordance with certain aspects of the present disclosure.
  • the MBS service is configured with a MCCH notification cycle 320ms and zero SFN offset. Then there are four NFs valid for the initial transmission of the control information and/or notification of this MBS service.
  • the MBS service is configured with a repetition cycle 80ms (i.e. eight system frames) .
  • each initial transmission is only repeated once for this MBS service.
  • the initial transmission can be repeated once or a plural of times within the configured MCCH notification cycle.
  • one cell typically support the simultaneous transmission of a large number of MBS services (e.g. 1024 services) .
  • MBS services e.g. 1024 services
  • it would be difficult to assign a unique MCCH notification cycle to each MBS service since the available NFs within a MBS DRX cycle are usually limited.
  • One possibility is to utilize different Notification Occasions within the NFs to host different MBS service when they share the same MCCH notification cycle.
  • the available of Notification Occasions within a Notification Frame are usually also limited. For example, in NR, the maximum configuration of Notification Occasions (NO) within a Notification Frame can be four.
  • a new DCI format is used to carry the content of MCCH transmission and/or notification in order to reduce the reserved bits in DCI format 1_0.
  • the DCI is called MCCH DCI.
  • the content of MCCH DCI can include two bits to indicate the modification of the MCCH.
  • One bit is used to indicate the start of new MBS service for the current MBS service group (s) that shares the same MCCH notification cycle, or start of new MBS service for a new MBS service group that shares the same MCCH notification cycle as the current one.
  • the other bit is used to indicate the change of the ongoing MBS services that have the same MCCH Notification cycle.
  • the content of MCCH DCI can include two bits to indicate the modification of the other MCCH that uses different MCCH Notification cycle.
  • One bit is used to indicate the start of new MBS service of MBS service group that have different MCCH notification cycle from the current one.
  • the other bit is used to indicate the change of the ongoing MBS services that have different MCCH Notification cycle.
  • R is the Repetition Cycle of the MBS service or MBS service group.
  • Repetition Cycle is configured by RRC in system information.
  • the integer n includes all of the integers within the set ⁇ 0, 1, ..., M ⁇ , where M is the configured Repetition Factor of the MBS service or MBS service group.
  • MBS Service Group identity For each MBS service group, one or any combination of the information elements of MBS Service Group identity, MBS Scaling Factor (or MCCH notification cycle) , and corresponding MCCH LCID.
  • the Scaling Factor can be used to calculate the MCCH notification cycle based on MBS DRX cycle.
  • the MCCH Repetition cycle and Repetition Factor are also included for each MBS Service Group.
  • Step 3 of Figure 8 the relevant MTCH transmission is scheduled by the network in light of the configured MTCH scheduling information as acquired by the UE in Step 2 of Figure 8.
  • the UE receives the MTCH transmission, which is transmitted in multicast or broadcast manner.
  • Step 4 of Figure 8 the UE periodically checks the MCCH DCI in the boundary of MCCH notification cycle. When there is no modification indicated in the DCI, the UE skips the reception of the MCCH scheduled by the DCI. It should be noted that there may be some modification for other MBS service or MBS service group, which can be also included in the current MCCH DCI.
  • Step 5 of Figure 8 the MTCH transmission scheduled by the network is the same as Step 3, as there is no modification at Step 4 of Figure 8.

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

Abstract

La présente invention concerne un appareil et des procédés permettant de prendre en charge la notification de planification et de modification des informations de commande pour un service de diffusion/multidiffusion (MBS). Dans un nouvel aspect, les informations de commande pour un service de diffusion/multidiffusion (MBS) sont transmises par de multiples MCCH ayant chacun un cycle de notification MCCH indépendant. Le cycle de notification MCCH est calculé sur la base d'une mise à l'échelle du cycle DRX de MBS spécifique à une cellule par l'intermédiaire d'un facteur de mise à l'échelle. Un DCI de MCCH, avec CRC brouillé par M-RNTI, planifie le MCCH. Les DCI de MCCH indiquent que seules les informations de planification pour la transmission MCCH sont présentes dans les DCI. Les DCI de MCCH incluent un bit pour indiquer la modification des informations MCCH par comparaison avec le dernier cycle de notification MCCH à la limite du cycle de notification MCCH. Les UE qui sont intéressés par un service MBS particulier ou un groupe de services MBS particulier surveillent uniquement les trames de notification selon le cycle de notification MCCH configuré pour le service MBS ou le groupe de services MBS. La configuration des paramètres MBS pour la réception de MCCH pour des services MBS est transmise par un SIB spécifique au MBS, qui transporte des informations MCCH contenant la configuration DRX MBS de la cellule et un ou plusieurs parmi un service MBS ou un groupe de services MBS.
PCT/CN2020/081157 2020-03-25 2020-03-25 Procédés et appareil de notification de planification et de modification d'informations de commande pour service de diffusion/multidiffusion WO2021189307A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2020/081157 WO2021189307A1 (fr) 2020-03-25 2020-03-25 Procédés et appareil de notification de planification et de modification d'informations de commande pour service de diffusion/multidiffusion
PCT/CN2021/082965 WO2021190596A1 (fr) 2020-03-25 2021-03-25 Notification de planification et de modification d'informations de commande pour multidiffusion et diffusion

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PCT/CN2020/081157 WO2021189307A1 (fr) 2020-03-25 2020-03-25 Procédés et appareil de notification de planification et de modification d'informations de commande pour service de diffusion/multidiffusion

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Cited By (1)

* Cited by examiner, † Cited by third party
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WO2023065224A1 (fr) * 2021-10-21 2023-04-27 Zte Corporation Réception discontinue pour service de diffusion et de multi-diffusion

Citations (2)

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WO2009035282A2 (fr) * 2007-09-13 2009-03-19 Lg Electronics Inc. Procédé d'obtention d'informations de contrôle au moyen d'un processus de messagerie
WO2018027906A1 (fr) * 2016-08-12 2018-02-15 Mediatek Singapore Pte. Ltd Procédés et dispositifs pour une transmission multidiffusion

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KR100595644B1 (ko) * 2004-01-09 2006-07-03 엘지전자 주식회사 이동통신 시스템에서 점대다 서비스를 위한 통지 지시자 수신방법
WO2017028504A1 (fr) * 2015-08-14 2017-02-23 华为技术有限公司 Procédé de lecture et d'envoi de service de multidiffusion et dispositif approprié
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Publication number Priority date Publication date Assignee Title
WO2009035282A2 (fr) * 2007-09-13 2009-03-19 Lg Electronics Inc. Procédé d'obtention d'informations de contrôle au moyen d'un processus de messagerie
WO2018027906A1 (fr) * 2016-08-12 2018-02-15 Mediatek Singapore Pte. Ltd Procédés et dispositifs pour une transmission multidiffusion

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INTEL CORPORATION: "SC-PTM for FeMTC", 3GPP DRAFT; R1-1609479 INTEL - SC-PTM_FEMTC, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Lisbon, Portugal; 20161010 - 20161014, 9 October 2016 (2016-10-09), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051149519 *
MEDIATEK INC.: "Discussion on SC-PTM", 3GPP DRAFT; R1-167556 DISCUSSION ON SC-PTM IN ENHANCED COVERAGE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Gothenburg, Sweden; 20160822 - 20160826, 21 August 2016 (2016-08-21), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051125977 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023065224A1 (fr) * 2021-10-21 2023-04-27 Zte Corporation Réception discontinue pour service de diffusion et de multi-diffusion

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