WO2018063425A1 - Configuration d'un temporisateur de temps de déclenchement (ttt) sur la base d'une mobilité - Google Patents

Configuration d'un temporisateur de temps de déclenchement (ttt) sur la base d'une mobilité Download PDF

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Publication number
WO2018063425A1
WO2018063425A1 PCT/US2016/069587 US2016069587W WO2018063425A1 WO 2018063425 A1 WO2018063425 A1 WO 2018063425A1 US 2016069587 W US2016069587 W US 2016069587W WO 2018063425 A1 WO2018063425 A1 WO 2018063425A1
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WO
WIPO (PCT)
Prior art keywords
mobility state
value
serving cell
ttt
measurement report
Prior art date
Application number
PCT/US2016/069587
Other languages
English (en)
Inventor
Candy YIU
Yujian Zhang
Sudeep K. Palat
Youn Hyoung Heo
Original Assignee
Yiu Candy
Yujian Zhang
Palat Sudeep K
Youn Hyoung Heo
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 Yiu Candy, Yujian Zhang, Palat Sudeep K, Youn Hyoung Heo filed Critical Yiu Candy
Publication of WO2018063425A1 publication Critical patent/WO2018063425A1/fr

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Classifications

    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data

Definitions

  • the TTT value can be dependent on the mobility state. For example, the TTT value for a low mobility state can be greater than the TTT value for the medium mobility state. Additionally, the TTT value for the medium mobility state can be higher than the TTT value for the high mobility state.
  • An A3event may be a measurement- reporting event that occurs when a neighbor cell's RSRP (e.g., target cell RSRP 203) becomes an amount of offset (i.e., an offset value 205) better than the RSRQ of the primary cell (PCell) (e.g., the serving cell RSRP 201).
  • an A3 event may refer to an 'Event A3' in accordance with 3 GPP T.S. 36.331 (3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification (Release 11)) although this is not a requirement.
  • the Event A3 triggers the measurement report 209 when the offset value 205 and TTT value 207 requirements are met.
  • the RF circuitry 406 can include physical-layer (PHY) layer circuitry for communicating with an eNB through one or more antennas 410.
  • the RF circuitry 406 may be configured to transmit the measurement report 209 to the serving eNB 104 for handover initiation from the serving cell 101 to the target cell 103 when the target cell RSRP 203 exceeds the serving cell RSRP 201 in accordance with the selected handover initiation parameters.
  • the plurality of TTT values or scaling factors may be stored in memory of the UE 400.
  • the UE 400 may calculate several different feedback values, which may be used to perform channel adaption for closed-loop spatial multiplexing transmission mode.
  • These feedback values may include a channel-quality indicator (CQI), a rank indicator (RI) and a precoding matrix indicator (PMI).
  • CQI channel-quality indicator
  • RI rank indicator
  • PMI precoding matrix indicator
  • the transmitter selects one of several modulation alphabets and code rate combinations.
  • the RI informs the transmitter about the number of useful transmission layers for the current MIMO channel
  • the PMI indicates the codebook index of the precoding matrix (depending on the number of transmit antennas) that is applied at the transmitter.
  • the code rate used by the eNB may be based on the CQI.
  • embodiments of the method 500 may include additional or even fewer operations or processes in comparison to what is illustrated in FIG. 5.
  • embodiments of the method 500 are not necessarily limited to the chronological order that is shown in FIG. 5.
  • the UE 102 can enter a high- mobility state when criteria for the high-mobility state are detected.
  • the application circuitry 402 can cause the UE 102 to enter the high- mobility state when the criteria for the high-mobility state are detected. For example, when the velocity associated with the UE 102 is greater than 60 km/h, then the UE 102 enters the high -mobility state, although the scope of the embodiments is not limited in this respect.
  • the channel condition can be labeled as bad when the RSRP is below -90 dBm.
  • the UE 102 can be refrained (e.g., even when the target cell RSRP is greater than the serving cell RSRP) from transmitting a measurement report to initiate a handover.
  • the UE may determine a reference signal received power (RSRP) of a serving cell and an RSRP of a target cell and may transmit a measurement report to a serving eNB for handover from the serving cell to the target cell when the target cell RSRP exceeds the serving cell RSRP in accordance with the selected handover initiation parameters.
  • RSRP reference signal received power
  • Example 20 is a method for an apparatus of a UE (e.g., UE 102), the apparatus comprising: means for causing the UE to enter a high-mobility state when criteria for the high-mobility state are detected; means for causing the UE to enter a low-mobility state when criteria for the low-mobility state are detected; means for selecting a small time-to-trigger (TTT) value when the UE is in the high-mobility state; means for selecting a large TTT value when the UE is in the low-mobility state, the large TTT value being larger than the small TTT value; and means for encoding a measurement report when a timer with the selected TTT value expires for transmission to initiate handover.
  • TTT time-to-trigger
  • Example 25 includes the apparatus of Examples 20-23, the apparatus further comprising: means for starting a timer having a timer value in response to the encoded measurement report being sent, wherein the timer value associated with the UE being in the low-mobility state is higher than the timer value associated with the UE being in the high-mobility state; and wherein the apparatus further comprises transceiver circuitry to refrain from transmitting a subsequent measurement report before the timer expires.

Landscapes

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

Abstract

Des modes de réalisation de la présente invention concernent un équipement utilisateur (UE) et un procédé d'amélioration d'un transfert intercellulaire au moyen de l'état de mobilité de l'UE dans un réseau sans fil. Dans certains modes de réalisation, un UE sélectionne de manière adaptative des paramètres d'initiation d'un transfert intercellulaire au moins en partie sur la base de l'état de mobilité de l'UE. Dans certains de ces modes de réalisation, les paramètres d'initiation d'un transfert intercellulaire peuvent comprendre une valeur de temps de déclenchement (TTT) et un facteur de mise à l'échelle associé à la valeur TTT. En outre, les paramètres d'initiation d'un transfert intercellulaire peuvent être une condition d'un canal (par exemple une puissance reçue d'un signal de référence (RSRP) d'une cellule de desserte). Dans certains cas, un nouvel événement de mesure peut se produire lorsque la RSRP de la cellule de desserte est supérieure à un seuil. Par exemple, l'UE peut être empêché de transmettre un rapport de mesure pendant le nouvel événement de mesure. En outre, un temporisateur de rapport de mesure peut être utilisé pour empêcher l'UE de transmettre un rapport de mesure avant l'expiration du temporisateur.
PCT/US2016/069587 2016-09-29 2016-12-30 Configuration d'un temporisateur de temps de déclenchement (ttt) sur la base d'une mobilité WO2018063425A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662401747P 2016-09-29 2016-09-29
US62/401,747 2016-09-29

Publications (1)

Publication Number Publication Date
WO2018063425A1 true WO2018063425A1 (fr) 2018-04-05

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PCT/US2016/069587 WO2018063425A1 (fr) 2016-09-29 2016-12-30 Configuration d'un temporisateur de temps de déclenchement (ttt) sur la base d'une mobilité

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WO (1) WO2018063425A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020089513A1 (fr) * 2018-11-02 2020-05-07 Nokia Technologies Oy Procédé d'adaptation de mesures de rrm d'ue destinée à une économie d'énergie
CN112385259A (zh) * 2018-05-23 2021-02-19 联想(北京)有限公司 用于测量报告触发的方法及设备
WO2023019546A1 (fr) * 2021-08-20 2023-02-23 Qualcomm Incorporated Optimisation de transfert intercellulaire pour communications à mobilité élevée
EP4068839A4 (fr) * 2019-11-26 2023-11-29 Mitsubishi Electric Corporation Système de communication, station de base et terminal de communication

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1146756A1 (fr) * 2000-04-11 2001-10-17 Siemens Aktiengesellschaft Station mobile et méthode de surveillance dynamique de cellules voisines
WO2009073525A1 (fr) * 2007-11-29 2009-06-11 Interdigital Patent Holdings, Inc. Procédé et appareil pour un transfert adaptatif
WO2009079351A2 (fr) * 2007-12-14 2009-06-25 Interdigital Patent Holdings, Inc. Information de niveau système pour information système, radiomessagerie et mesures
WO2015196919A1 (fr) * 2014-06-23 2015-12-30 索尼公司 Appareil électronique dans un système de communications sans fil, et procédé de mesure de mobilité

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1146756A1 (fr) * 2000-04-11 2001-10-17 Siemens Aktiengesellschaft Station mobile et méthode de surveillance dynamique de cellules voisines
WO2009073525A1 (fr) * 2007-11-29 2009-06-11 Interdigital Patent Holdings, Inc. Procédé et appareil pour un transfert adaptatif
WO2009079351A2 (fr) * 2007-12-14 2009-06-25 Interdigital Patent Holdings, Inc. Information de niveau système pour information système, radiomessagerie et mesures
WO2015196919A1 (fr) * 2014-06-23 2015-12-30 索尼公司 Appareil électronique dans un système de communications sans fil, et procédé de mesure de mobilité

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"3GPP; TSG RAN; User Equipment (UE) procedures in idle mode and procedures for cell reselection in connected mode (Release 13", 3GPP TS 25.304, 8 January 2016 (2016-01-08), pages 1 - 58, XP051065216 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112385259A (zh) * 2018-05-23 2021-02-19 联想(北京)有限公司 用于测量报告触发的方法及设备
CN112385259B (zh) * 2018-05-23 2023-06-13 联想(北京)有限公司 用于测量报告触发的方法及设备
WO2020089513A1 (fr) * 2018-11-02 2020-05-07 Nokia Technologies Oy Procédé d'adaptation de mesures de rrm d'ue destinée à une économie d'énergie
EP4068839A4 (fr) * 2019-11-26 2023-11-29 Mitsubishi Electric Corporation Système de communication, station de base et terminal de communication
WO2023019546A1 (fr) * 2021-08-20 2023-02-23 Qualcomm Incorporated Optimisation de transfert intercellulaire pour communications à mobilité élevée

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