WO2021230712A1 - Procédés et appareil permettant de gérer des transferts intercellulaires dans une configuration à double connectivité dans un système de communication sans fil - Google Patents

Procédés et appareil permettant de gérer des transferts intercellulaires dans une configuration à double connectivité dans un système de communication sans fil Download PDF

Info

Publication number
WO2021230712A1
WO2021230712A1 PCT/KR2021/006086 KR2021006086W WO2021230712A1 WO 2021230712 A1 WO2021230712 A1 WO 2021230712A1 KR 2021006086 W KR2021006086 W KR 2021006086W WO 2021230712 A1 WO2021230712 A1 WO 2021230712A1
Authority
WO
WIPO (PCT)
Prior art keywords
handover
stack
expected
undergo
configuration
Prior art date
Application number
PCT/KR2021/006086
Other languages
English (en)
Inventor
Rishav Agarwal
Jyotirmoy Karjee
Raja Moses Manoj Kumar Eda
Shouvik Guha
Original Assignee
Samsung Electronics Co., 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.)
Filing date
Publication date
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Publication of WO2021230712A1 publication Critical patent/WO2021230712A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H04W36/00698—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using different RATs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the processor determines a deviation proportion of an allocated UL resource grant for both the stacks, based on the monitoring. Subsequently, the processor modifies upon receiving a handover command from the source cell associated with the stack expected to undergo handover, before expiry of the predefined time period, the BSR of the stack not undergoing handover, based on the deviation proportion of the allocated UL resource grant for both of the stacks. Finally, the processor transmits data packets only through the stack not undergoing handover, using a subsequently allocated UL resource grant for the stack not undergoing handover, based on the modified BSR, during the handover of the stack expected to undergo handover.
  • embodiments herein comprises a 5G User Equipment (UE), connected to at least a first Radio Access Technology (RAT) and a second RAT, for configuring Uplink.
  • the UE comprising a processor and a memory communicatively coupled to the processor, wherein the memory stores the processor-executable instructions, which, on execution, causes the processor to send a portion of a plurality of data packets to a network using the first RAT and the second RAT based on a first Uplink Split Configuration.
  • the processor initiates a handover to a target cell having a signal strength above a pre-defined threshold. Further, the processor determines a plurality of Radio resource Capabilities of the target cell after the handover is initiated.
  • FIG.1b shows an exemplary conventional scenario indicating Sequence Number (SN) gap at receiver end, after a handover.
  • the UE initially transmits a measurement report to a source cell associated with the stack expected to undergo handover, to indicate handover of the stack from a corresponding source cell to a target cell. Thereafter, the UE may monitor a grant allocation ratio for the stack expected to undergo handover and the stack not undergoing handover, with respect to the UL resource grant requested in respective BSRs.
  • the BSR of the stack expected to undergo handover and the BSR of the stack not undergoing handover may be transmitted to a source cell associated with the stack not undergoing handover and the source cell associated with the stack expected to undergo handover, respectively, before transmitting the measurement report to indicate the expected handover.
  • the BSR report may be modified by increasing or boosting the UL resource grant initially requested for the stack not undergoing handover, by a percentage that may be sufficient to accommodate the data packets that were opted to be transmitted via the stack expected to undergo handover. Thereafter, the UE may transmit all the data packets (including the data packets that were initially opted to be sent through the stack expected to undergo handover), via the stack not undergoing handover, using a subsequently allocated UL resource grant based on the modified BSR, before completion of the handover of the stack expected to undergo handover. Therefore, before the handover, the UE may manage the throughput loss that could occur because of the handover, by increasing or boosting the BSR of the stack that is not undergoing handover.
  • the UE 201 may include a processor 216, an Input/Output (I/O) interface 217 and a memory 219.
  • the I/O interface 217 may receive Uplink (UL) resource grants from the source cells 207 and 209, and Master Information Block (MIB) and System Information Block (SIB) from the target cell 213, which is stored temporarily in the memory 219.
  • the processor 216 may use the exemplary architecture 200a to implement the methods and systems for managing throughput loss before, after and during a handover in the DC configuration. These methods and systems are explained in detail under the description of FIG.3a-FIG.3i in the disclosure.
  • the grant data 307 may include Uplink (UL) resource grant allocated by the source cells 207 and 209 for the stacks 203 and 205 of the DC configuration, respectively.
  • the UL resource grant may be allocated by the source cells 207 and 209 for each stack 203 and 205 based on a Buffer Status Report (BSR) of the corresponding stacks 203 and 205.
  • BSR Buffer Status Report
  • the BSR may be a report which indicates to the network i.e. to the source cells 207 and 209, the amount of data to be transmitted from the UE 201, and number resources required for transmitting the data.
  • the BSR modifying module 323 may modify the BSR of the stack not undergoing handover 203. Such modification of the BSR may be based on the determined deviation proportion of the allocated UL resource grant for both of the stacks 203 and 205. In some embodiments, upon receiving the handover command before the expiry of the predefined time period, the BSR modifying module 323 may initially stop pre-processing of the data packets in the stack expected to undergo handover 205, and thereafter proceed with modifying the BSR of the stack not undergoing handover 203.
  • the UE 201 may stop pre-processing of the data packets in the stack expected to undergo handover 205, when the handover command is received from the source cell 209 before the expiry of the predefined time period. In case the handover command is received from the source cell 209 after the predefined time period, the UE 201 may proceed with pre-processing of the data packets via the stack expected to undergo handover 205.
  • the stack expected to undergo handover 205 is a New Radio (NR) stack, like in solution 1 and 2.
  • NR New Radio
  • the recommended data 355 may include recommendations provided by the UE 201 to a user of the UE 201.
  • the recommendations may include, recommendation of one or more potential target cells 215 for performing handover based on the corresponding predicted split ratios.
  • the recommendations may include recommending one or more navigation routes that facilitate handover of the stack expected to undergo handover 205.
  • the split ratio of the one or more potential target cells 215 is determined before the occurrence of the handover so that, the UE 201 may have the choice of associating with the potential target cell 215 which provides at least one of consistent throughput, minimal throughput loss, or throughput gain when compared to throughput provided by current source cell 209 associated with the stack expected to undergo handover 205.
  • the split ratio predicting module 361 may predict the sample split ratios at each of the 10 time instances, for each of the 5 potential target cells, using the corresponding dynamic information captured at each of the 10 time instances, and the historic information of the corresponding 5 potential target cells 215. In some embodiments, the split ratio predicting module 361 may predict the sample split ratios at each of the plurality of time instances using at least one of the below Equations 2 and 3.
  • the recommending module 363 may recommend the one or more potential target cells 215 for the handover based on the predicted split ratios of the one or more potential target cells 215, to the user of the UE 201. In one embodiment, the recommending module 363 may recommend the potential target cell 215 with that provides maximum throughput for the user. In another embodiment, the recommending module 363 may recommend the one or more potential target cell 215 that provide throughput greater than the current source cell 209 for the user. In yet another embodiment, the recommending module 363 may recommend the one or more potential target cell 215 that provide consistent throughput as that provided by the current source cell 209 for the user.
  • the above mentioned recommending rules are just exemplary and should not be construed as a limitation of the disclosure, as the recommendation can be done based on any other rules.
  • the UE 201 may calculate a second Uplink Split Configuration based on a remaining portion of the plurality of data packets and the plurality of Radio Resource Capabilities of the target cell 213. Finally, the UE 201 may send the remaining portion of the plurality of data packets using the first RAT and the second RAT based on the second Uplink Split Configuration.
  • method 400a is not intended to be construed as a limitation, and any number of the described method blocks can be combined in any order to implement the method 400a. Additionally, individual blocks may be deleted from the methods without departing from the spirit and scope of the subject matter described herein. Furthermore, the method 400a can be implemented in any suitable hardware, software, firmware, or combination thereof.
  • the method 400b may include determining, by the processor 216, a new split ratio of a new DC configuration to be formed after handover of the stack expected to undergo handover 205, based on the determined UL throughput capabilities.
  • the new DC configuration may include the stack that did not undergo handover 203 and a new stack established after handover 211.
  • determining the new split ratio of the current DC configuration may include one of increasing or decreasing the split ratio by a percentage value.
  • the processor 216 may determine the percentage value dynamically based on the nature, the UL bandwidth related information of the target cell 213, and spectral efficiencies available on each of the stack not undergoing handover 203 and the stack expected to undergo handover 205.
  • computer system 500 may communicate with input devices 511 and output devices 512.
  • Computer system 500 may implement web browser 508 stored program components.
  • Web browser 508 may be a hypertext viewing application, such as MICROSOFT ® INTERNET EXPLORER ® , GOOGLE TM CHROME TM , MOZILLA ® FIREFOX ® , APPLE ® SAFARI ® , etc. Secure web browsing may be provided using Secure Hypertext Transport Protocol (HTTPS), Secure Sockets Layer (SSL), Transport Layer Security (TLS), etc.
  • Web browsers 508 may utilize facilities such as AJAX, DHTML, ADOBE ® FLASH ® , JAVASCRIPT ® , JAVA ® , Application Programming Interfaces (APIs), etc.
  • the computer system 500 may implement a mail client stored program component.
  • the mail client may be a mail viewing application, such as APPLE ® MAIL, MICROSOFT ® ENTOURAGE ® , MICROSOFT ® OUTLOOK ® , MOZILLA ® THUNDERBIRD ® , etc.
  • the deviation proportion indicates: deviation proportion of the allocated UL resource grant for the stack expected to undergo handover (205) from the UL resource grant requested in the BSR of the stack expected to undergo handover (205), and a corresponding grant allocation loss or a grant allocation gain, and deviation proportion of the allocated UL resource grant of the stack not undergoing handover (203) from the UL resource grant requested in the BSR corresponding to the stack not undergoing handover (203), and a corresponding grant allocation loss or a grant allocation gain.
  • the method further comprises stopping, by the UE (201), pre-processing of the data packets in the stack expected to undergo handover (205), when the handover command is received from the source cell (209) before the expiry of the predefined time period.
  • each stack among the two stacks (203, 205) is associated with a distinct source cell (207, 209), wherein one stack among the two stacks (203, 205) is expected to undergo handover to a target cell (213).
  • determining the new split ratio of the current DC configuration comprises one of increasing or decreasing the split ratio by a percentage value, wherein the UE (201) determines the percentage value dynamically based on the nature, the UL bandwidth related information of the target cell (213), and spectral efficiencies available on each of the stack not undergoing handover (203) and the stack expected to undergo handover (205).
  • the method further comprises enabling, by the UE (201), the trained machine learning model to self-learn based on results of each split ratio prediction.
  • the processor (216) monitors the grant allocation ratio for the stack not undergoing handover (203) for a first time period within the predefined time period.
  • the processor (216) is configured to: for each of the one or more potential target cells (215), predict a plurality of sample split ratios at the plurality of time instances using the dynamic information captured at the corresponding plurality of time instances, and the historic information related to the one or more potential target cells (215); and select an optimal sample split ratio among each of the corresponding predicted plurality of sample split ratios as the split ratio of the corresponding one or more potential target cells (215), wherein the optimal sample split ratio is the split ratio which achieves at least one of consistent throughput, minimal throughput loss, or throughput gain when compared to throughput provided by current source cell (209) associated with the stack expected to undergo handover (205).

Abstract

Une configuration à double connectivité est divulguée ici, divulguant des procédés et des systèmes permettant de gérer un transfert intercellulaire, pouvant comprendre la gestion d'une perte de débit se produisant avant/après/pendant des transferts intercellulaires dans une configuration à double connectivité. Une solution réalisée avant le transfert intercellulaire comprend la gestion d'une perte de débit par amplification temporaire d'un rapport d'état de tampon (BSR) d'une pile qui ne subit pas de transfert intercellulaire et la transmission de tous les paquets de données au moyen de l'autorisation de ressource de liaison montante reçue pour le BSR amplifié. Une autre solution réalisée après le transfert intercellulaire comprend la détermination d'un rapport de division avant le transfert intercellulaire lui-même sur la base d'informations sur la nature et la bande passante de la cellule cible, et l'application de celle-ci après le transfert intercellulaire, pour atténuer la perte de débit qui se produit après le transfert intercellulaire. Une autre solution réalisée pendant le transfert intercellulaire est une combinaison d'une première solution de BSR d'amplification et d'une seconde solution de détermination d'un rapport de division. Une autre solution permet de prédire le rapport de division de cellules cibles potentielles pour un transfert intercellulaire estimé au moyen d'un modèle d'intelligence artificielle.
PCT/KR2021/006086 2020-05-14 2021-05-14 Procédés et appareil permettant de gérer des transferts intercellulaires dans une configuration à double connectivité dans un système de communication sans fil WO2021230712A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202041020384 2020-05-14
IN202041020384 2021-04-30

Publications (1)

Publication Number Publication Date
WO2021230712A1 true WO2021230712A1 (fr) 2021-11-18

Family

ID=78526474

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2021/006086 WO2021230712A1 (fr) 2020-05-14 2021-05-14 Procédés et appareil permettant de gérer des transferts intercellulaires dans une configuration à double connectivité dans un système de communication sans fil

Country Status (1)

Country Link
WO (1) WO2021230712A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160249259A1 (en) * 2013-09-30 2016-08-25 Lg Electronics Inc. Method for Determining Radio Resource Control Configuration in a Wireless Communication System Supporting Dual Connectivity and Apparatus Thereof
EP3573359A1 (fr) * 2017-03-01 2019-11-27 HTC Corporation Station de base et procédé de gestion de configuration d'équipement utilisateur
CN110958653A (zh) * 2018-09-27 2020-04-03 维沃移动通信有限公司 一种双连接切换方法、终端及网络设备
KR20200047765A (ko) * 2014-03-10 2020-05-07 닛본 덴끼 가부시끼가이샤 Dc (이중 접속성) 를 위한 장치, 시스템 및 방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160249259A1 (en) * 2013-09-30 2016-08-25 Lg Electronics Inc. Method for Determining Radio Resource Control Configuration in a Wireless Communication System Supporting Dual Connectivity and Apparatus Thereof
KR20200047765A (ko) * 2014-03-10 2020-05-07 닛본 덴끼 가부시끼가이샤 Dc (이중 접속성) 를 위한 장치, 시스템 및 방법
EP3573359A1 (fr) * 2017-03-01 2019-11-27 HTC Corporation Station de base et procédé de gestion de configuration d'équipement utilisateur
CN110958653A (zh) * 2018-09-27 2020-04-03 维沃移动通信有限公司 一种双连接切换方法、终端及网络设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "Switch of UL data during DAPS handover with 2-step RA or RACH-less access", 3GPP DRAFT; R2-2000128, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Elbonia; 20200224 - 20200306, 13 February 2020 (2020-02-13), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051848491 *

Similar Documents

Publication Publication Date Title
WO2020197343A1 (fr) Procédé et dispositif de notification de la capacité de l'ue pour le mr-dc dans le système nr
WO2020139015A1 (fr) Procédé et appareil de gestion de mobilité dans un système de communication sans fil
WO2020222571A1 (fr) Procédé et appareil pour signaler des capacités d'équipement utilisateur (ue) à l'aide d'un identifiant spécifique à un fabricant de capacité d'ue dans des systèmes de communication mobile de prochaine génération
WO2019245304A1 (fr) Procédé et appareil de réalisation de changement de cellule conditionnel sur la base d'une occupation de canal dans un système de communication sans fil
WO2021225406A1 (fr) Procédé et dispositif de génération et d'élimination d'eas dynamique à l'aide d'une appli et d'un état d'ue
EP3759962A1 (fr) Procédé de prise en charge de transfert intercellulaire et station de base et noeud de réseau correspondants
WO2021154032A1 (fr) Procédé et appareil de modification de configuration liée à la mobilité conditionnelle dans un système de communication sans fil
WO2018203733A1 (fr) Procédé et appareil de planification de liaison montante sur priorité de canal logique dans un système de communication mobile
WO2016010394A1 (fr) Procédé et appareil permettant d'améliorer le taux de réussite de transfert
WO2019031947A1 (fr) Procédé et système pour réaliser un transfert dans un réseau de communication sans fil
WO2017131479A1 (fr) Procédé et appareil permettant de réduire le surdébit de signalisation et la batterie du terminal
WO2020167036A1 (fr) Procédé et appareil de notification de défaillance sur une liaison terrestre dans un système de communication sans fil
WO2020226392A1 (fr) Procédé et appareil de gestion de ressources radio dans un système de communication sans fil
WO2020226398A1 (fr) Procédé et appareil de gestion de mobilité dans un système de communication sans fil
WO2016208919A1 (fr) Appareil et procédé de transmission ou de réception de signal dans un système de communications mobiles
WO2020218863A1 (fr) Amélioration de la mobilité pour une technologie d'accès nouvelle radio
WO2018128430A1 (fr) Procédé et appareil de retransmission dans un système de communication
WO2019245339A1 (fr) Procédé et appareil pour synchroniser une opération de duplication de paquet entre des nœuds de station de base dans un système de communications mobiles
EP3900437A1 (fr) Procédé et appareil d'interdiction de cellule dans un système de communication sans fil
WO2021075844A1 (fr) Procédé et appareil pour la mobilité en connectivité double dans un système de communication sans fil
WO2021172874A1 (fr) Procédé et appareil d'exécution de fonction de réseau virtualisé
WO2021230712A1 (fr) Procédés et appareil permettant de gérer des transferts intercellulaires dans une configuration à double connectivité dans un système de communication sans fil
WO2020167028A1 (fr) Procédé et appareil de commande de contexte d'ue dans un système de communication sans fil
WO2020179993A1 (fr) Appareil et procédé pour transmettre et recevoir des données dans un système de communication sans fil
WO2016186396A1 (fr) Procédé et appareil de réglage de valeur de fenêtre initiale dans un système de communication sans fil

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21803470

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21803470

Country of ref document: EP

Kind code of ref document: A1