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WO2014117372A1 - Procédé et dispositif de transmission en liaison montante et terminal - Google Patents

Procédé et dispositif de transmission en liaison montante et terminal Download PDF

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Publication number
WO2014117372A1
WO2014117372A1 PCT/CN2013/071222 CN2013071222W WO2014117372A1 WO 2014117372 A1 WO2014117372 A1 WO 2014117372A1 CN 2013071222 W CN2013071222 W CN 2013071222W WO 2014117372 A1 WO2014117372 A1 WO 2014117372A1
Authority
WO
WIPO (PCT)
Prior art keywords
timing advance
variation
uplink
timing
prediction
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2013/071222
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English (en)
Inventor
Jiangshan Chen
Liyong Yin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ST Ericsson SA
Original Assignee
ST Ericsson SA
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 ST Ericsson SA filed Critical ST Ericsson SA
Priority to PCT/CN2013/071222 priority Critical patent/WO2014117372A1/fr
Publication of WO2014117372A1 publication Critical patent/WO2014117372A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time

Definitions

  • the present invention relates to the field of telecommunication network, in particular to an uplink transmission method, an uplink transmission device, and a terminal.
  • the terminal adjusts the timing advance in accordance with the received command, so as to realize the adjustment of the uplink closed-loop timing synchronization.
  • demodulation performance of the base station and the terminal determines the correctness of the generation and reception of the uplink timing synchronization shift command.
  • the uplink signal transmitted by the terminal in accordance with the received uplink timing synchronization shift command may go beyond a range of a base station demodulation window, and as a result, the uplink demodulation will be failed and even the link will be interrupted.
  • An object of the present invention is to provide an uplink transmission method, an uplink transmission device, and a terminal, so as to provide a prediction and prevention way when an uplink signal goes beyond a range of a base station demodulation window, thereby to reduce the possibility of the uplink signal going beyond the base station demodulation window and enhance reliability of the uplink.
  • the present invention provides an uplink transmission method for use in a TDD mode CDMA system, comprising:
  • the method prior to receiving an uplink timing synchronization shift command, the method further comprises:
  • the prediction condition where an uplink signal is to enter into a demodulation window includes: a difference between a first timing advance variation and a first reference downlink timing variation falls within a prediction range where an uplink signal is to enter into the demodulation window.
  • the first timing advance variation is a variation of the current timing advance relative to an initial timing advance
  • the initial timing advance is a timing advance for the prediction reference time.
  • the first reference downlink timing variation is double a first variation of a distance D from a current base station to a terminal relative to an initial D, or a difference between the first variation doubled and a first correction value.
  • the initial D is that of the prediction reference time
  • the first correction value is a downlink timing synchronization error.
  • Updating the current timing advance so that the updated current timing advance meets the prediction condition where the uplink signal is to enter into a demodulation window includes:
  • the second timing advance variation is a variation of the updated current timing advance relative to the initial timing advance.
  • updating the current timing advance so that a difference between a second timing advance variation and the first reference downlink timing variation falls within the prediction range where the uplink signal is to enter into the demodulation window includes:
  • the step of determining a prediction reference time includes:
  • the uplink timing synchronization shift command is a synchronization shift SS symbol carried on a downlink Dedicated Channel (DCH).
  • the entry condition includes a first condition where a protocol stack indicates that the dedicated channel DCH is in a closed-loop state, a second condition where the protocol stack indicates that the SS symbol is carried on a downlink DCH, a third condition where the protocol stack indicates that the downlink DCH is in a synchronization state, and a fourth condition where a difference between a third timing advance variation and a second reference downlink timing variation falls within the range of [ ⁇ ⁇ , ⁇ ] .
  • the third timing advance variation is a timing advance variation determined based on all of the SS symbols carried on the downlink DCH and received by the terminal in accordance with the latest adjusting and matching period for the uplink and downlink closed-loop timing synchronization.
  • the second reference downlink timing variation is double a second variation of D within the latest adjusting and matching period for the uplink and downlink closed-loop timing synchronization, or a difference between the second variation doubled and a second correction value.
  • the second correction value is a downlink timing synchronization error within the latest adjusting and matching period for the uplink and downlink closed-loop timing synchronization.
  • ⁇ is a maximum value of the downlink timing synchronization error within the latest adjusting and matching period for the uplink and downlink closed-loop timing synchronization in a channel model.
  • the method further comprises:
  • the present invention further provides an uplink transmission device for use in a TDD mode CDMA, comprising:
  • a receiving module configured to receive an uplink timing synchronization shift command
  • a first determining module configured to determine a current timing advance in accordance with the uplink timing synchronization shift command;
  • a judging module configured to judge whether the current timing advance meets a prediction condition where an uplink signal is to enter into a demodulation window, so as to obtain a first judgment result;
  • a transmitting module configured to transmit the uplink signal in accordance with the current timing advance when the first judgment result is yes; and an updating and transmitting module, configured to update the current timing advance when the first judgment result is no, so that the updated current timing advance meets the prediction condition where the uplink signal is to enter into the demodulation window, and transmit the uplink signal in accordance with the updated current timing advance.
  • the device further comprises:
  • a second determining module configured to determine a prediction reference time before the receiving module receives the uplink timing synchronization shift command.
  • the prediction condition where an uplink signal is to enter into a demodulation window includes that a difference between a first timing advance variation and a first reference downlink timing variation falls within a prediction range where an uplink signal is to enter into the demodulation window.
  • the first timing advance variation is a variation of the current timing advance relative to an initial timing advance, and the initial timing advance is a timing advance for the prediction reference time.
  • the first reference downlink timing variation is double a first variation of a distance D from a current base station to a terminal relative to an initial D, or a difference between the first variation doubled and a first correction value.
  • the initial D is that of the prediction reference time, and the first correction value is a downlink timing synchronization error.
  • the updating and transmitting module includes:
  • an updating unit configured to update the current timing advance so that a difference between a second timing advance variation and the first reference downlink timing variation falls within the prediction range where the uplink signal is to enter into the demodulation window, wherein the second timing advance variation is a variation of the updated current timing advance relative to the initial timing advance;
  • a transmitting unit configured to transmit the uplink signal in accordance with the updated current timing advance.
  • the second determining module includes:
  • a judging unit configured to, before the receiving module receives the uplink timing synchronization shift command, judge whether an entry condition is met, so as to obtain a second judgment result
  • a determining unit configured to, before the receiving module receives the uplink timing synchronization shift command, determine the prediction reference time when the second judgment result is yes.
  • the device further comprises: a returning module, configured to, after the second determining module determines the prediction reference value, returns to the second determining module when an entry condition is met.
  • a returning module configured to, after the second determining module determines the prediction reference value, returns to the second determining module when an entry condition is met.
  • the present invention further provides a terminal comprising the above-mentioned uplink transmission device.
  • the present invention at least has the following beneficial effects.
  • the current timing advance determined based on an uplink timing synchronization shift command does not meet a prediction condition where an uplink signal is to enter into a demodulation window
  • the current timing advance is updated so as to meet the prediction condition, and the uplink signal is transmitted in accordance with the updated current timing advance.
  • the present invention provides a prediction and prevention way when the uplink signal goes beyond the range of a base station demodulation window, so as to reduce the possibility of the uplink signal going beyond the base station demodulation window and enhance reliability of the uplink.
  • Fig.l is a flow chart of an uplink transmission method according to embodiments of the present invention.
  • Fig.2 is a block diagram showing the uplink signal out-of-window detection modules according to embodiments of the present invention
  • Fig.3 is a flow chart of uplink signal out-of- window detection according to embodiments of the present invention
  • Fig 4 is a block diagram showing an uplink transmission device according to embodiments of the present invention.
  • Fig.l is a flow chart of an uplink transmission method according to embodiments of the present invention
  • the present invention provides an uplink transmission method for use in a TDD mode CDMA system, comprising:
  • Step 101 receiving an uplink timing synchronization shift command
  • Step 102 determining a current timing advance in accordance with the uplink timing synchronization shift command
  • Step 103 judging whether the current timing advance meets a prediction condition where an uplink signal is to enter into a demodulation window, so as to obtain a first judgment result;
  • Step 104 transmitting the uplink signal in accordance with the current timing advance when the first judgment result is yes; and Step 105: updating the current timing advance when the first judgment result is no, so that the updated current timing advance meets the prediction condition where the uplink signal is to enter into the demodulation window, and transmitting the uplink signal in accordance with the updated current timing advance.
  • the present invention provides a prediction and prevention way when the uplink signal goes beyond the range of the base station demodulation window, so as to reduce the possibility of the uplink signal going beyond the base station demodulation window and enhance reliability of the uplink.
  • the TDD mode CDMA system may adopt a TD-SCDMA or
  • the terminal shall transmit the UL signals in accordance with the following equation:
  • Tadv 2x D ( 1 ) wherein, Tadv is a timing advance, D is a distance between the base state and the terminal in chips.
  • a downlink timing synchronization error may also be taken into account for the relation between ST adv and 3D .
  • the terminal can predict whether the UL signal is out of the base station demodulation window using the relation between the variation of timing advance and the variation of D during the observation time. If the prediction result is yes, the terminal may restore STadv with 3D , so as to maintain the normal communication between the terminal and the base station.
  • the method prior to receiving an uplink timing synchronization shift command, the method further comprises:
  • the prediction condition where an uplink signal is to enter into a demodulation window includes: a difference between a first timing advance variation and a first reference downlink timing variation falls within a prediction range where the uplink signal is to enter into the demodulation window.
  • the first timing advance variation is a variation of the current timing advance relative to an initial timing advance, and the initial timing advance is a timing advance for the prediction reference time.
  • the first reference downlink timing variation is double a first variation of a distance D from a current base station to a terminal relative to an initial D, or a difference between the first variation doubled and a first correction value.
  • the initial D is that of the prediction reference time
  • the first correction value is a downlink timing synchronization error.
  • the step of updating the current timing advance so that the updated current timing advance meets the prediction condition where the uplink signal is to enter into the demodulation window includes:
  • the second timing advance variation is a variation of the updated current timing advance relative to the initial timing advance.
  • the downlink timing synchronization error may be an error obtained in accordance with the terminal capability, or an error actually obtained by the terminal during the period from the prediction reference time to the current time.
  • the prediction range where the uplink signal enters the demodulation range may be (n - n 0 , n), wherein n ° is a number of chips in the base station demodulation window, and the uplink timing synchronization position in the base station demodulation window is at the n th chip of the base station demodulation window from left.
  • n ° is 16 and n is 6.
  • the step of updating the current timing advance so that a difference between a second timing advance variation and the first reference downlink timing variation falls within the prediction range where the uplink signal is to enter into the demodulation window may include:
  • the step of determining a predicted reference time may include:
  • the entry condition including: the terminal determines the open- loop UL timing synchronization adjustment is completed in accordance with the relevant information from the base station, the terminal receives information indicating that the closed-loop uplink timing synchronization is completed from the base station, and the terminal receives information indicating that the closed-loop uplink timing synchronization is to be maintained from the base station.
  • the uplink timing synchronization shift command is a synchronization shift SS symbol carried on a downlink DCH.
  • the entry condition may include a first condition where a protocol stack indicates that the dedicated channel DCH is in a closed-loop state, a second condition where the protocol stack indicates that the SS symbol is carried on a downlink DCH, and a third condition where the protocol stack indicates that the downlink DCH is in a synchronization state. In other words, the entry condition is met only when the first, second and third conditions are fulfilled.
  • the entry condition may further include a fourth condition where a difference between a third timing advance variation and a second reference downlink timing variation falls within the range of [ ⁇ ⁇ , ⁇ ] .
  • the third timing advance variation is a timing advance variation determined based on all of the SS symbols carried on the downlink DCH and received by the terminal in accordance with the latest adjusting and matching period for the uplink and downlink closed-loop timing synchronization.
  • the second reference downlink timing variation is double a second variation of D within the latest adjusting and matching period for the uplink and downlink closed-loop timing synchronization, or a difference between the second variation doubled and a second correction value.
  • the second correction value is a downlink timing synchronization error within the latest adjusting and matching period for the uplink and downlink closed-loop timing synchronization.
  • ⁇ is a maximum value of the downlink timing synchronization error within the latest adjusting and matching period for the uplink and downlink closed-loop timing synchronization in a channel model.
  • the entry condition is met when the first, second, third and fourth conditions are fulfilled.
  • the adjusting and matching period St for the uplink and downlink closed-loop timing synchronization means that in an ideal circumstance, under the condition where the demodulation success rate for the base station and the
  • the timing advance variation obtained by the terminal in accordance with all of the SS symbols received within this period is the equivalent double the downlink timing synchronization variation within this period.
  • St may be the least integer common multiple of ul dl and dl ul , wherein
  • u l is an adjusting period for the network uplink timing synchronization
  • ul is an p
  • dl is an adjusting period for the terminal downlink timing synchronization
  • dl is an adjusting step size for the downlink timing synchronization
  • the unit of St is subframe.
  • St may also be a positive integral multiple of the least integer common multiple of
  • the method further comprises:
  • the entry condition may be any one of a fifth condition where the protocol stack indicates that the downlink dedicated channel is out of synchronization, a sixth condition where the protocol stack indicates that the current downlink channel is reconfigured; and a seventh condition where the protocol stack indicates that the current link is to be released.
  • Fig.2 is a block diagram showing the uplink signal out-of-window detection modules.
  • the modules include an uplink timing synchronization module 201, a downlink timing synchronization module 202 and an uplink timing synchronization out-of-window detection module 203.
  • the uplink timing synchronization module 201 is configured to determine an adjustment value of the timing advance and transmit the adjustment value of the timing advance to the uplink timing synchronization out-of- window detection module 203, perform real-time maintenance on the current timing advance for transmitting the Uplink (UL) signal by User Equipment (UE), receive a variation of the timing advance from the uplink timing synchronization out-of- window detection module 203, and update the current timing advance in accordance with the variation of the timing advance.
  • UL Uplink
  • UE User Equipment
  • the downlink timing synchronization module 202 is configured to control the downlink timing synchronization, estimate an adjustment value of a distance between the base station and the terminal, and output the adjustment value to the uplink timing synchronization out-of- window detection module 203.
  • the TDD mode CDMA system adopts a
  • the uplink timing synchronization shift command is an SS symbol carried on the downlink DCH.
  • the entry condition is met when the above first, second, third and fourth conditions are fulfilled, and the exit condition is met when any one of the above fifth, sixth and seventh conditions is fulfilled.
  • the adjusting and matching period St for the uplink and downlink closed-loop timing synchronization is the least
  • Fig.3 is a flow chart of the uplink signal out-of-window detection according to the preferred embodiment of the present invention. Referring to Fig.3, the detection comprises the following steps.
  • Step 301 judging whether the entry condition is met, if yes, turning to
  • Step 302 and otherwise returning to Step 301.
  • the UE after the UE is turned on and enters into a DCH mode, it periodically judge whether the entry condition is met, and determine a timing advance and D of the prediction reference time as an initial timing advance and an initial D when the entry condition is met.
  • Step 302 calculating a variation of the timing advance and a variation of a distance between the base station and the terminal.
  • the uplink timing synchronization out-of- window detection module 203 determines a prediction reference time, takes m frames as a prediction period starting from the prediction reference time (m is preferably 1), receives an adjustment value of the timing advance from the uplink timing synchronization module 201 and an adjustment value of D from the downlink timing synchronization module 202, and counts the variation of the timing advance and the variation of D corresponding to each prediction period, i.e., the variation of the timing advance and the variation of D during the period from the prediction reference time to the time when each prediction period is ended.
  • the adjustment values of the timing advance received within the first prediction period are added when the first prediction period is ended so as to obtain the variation of the timing advance corresponding to the first prediction period, and the adjustment values of D received within the first prediction period are added so as to obtain the variation of D corresponding to the first prediction period.
  • the variation of the timing advance corresponding to a previous prediction period is added to accumulated values of the adjustment values of the timing advance received within the prediction period to obtain a variation of the timing advance corresponding to the prediction period
  • the variation of D corresponding to a previous prediction period is added to accumulated values of the adjustment values of D received within the prediction period to obtain a variation of D corresponding to the prediction period.
  • the adjustment value of the timing advance close to the base station is positive and that away from the base station is negative
  • the adjustment value of D away from the base station is positive and that close to the base station is negative.
  • Step 303 judging whether the exit condition is met, if yes returning to
  • Step 301 and otherwise turning to Step 304.
  • the uplink timing synchronization out-of- window detection module 203 judges whether the exit condition is met when the variation of the timing advance and the variation of D corresponding to the prediction period has been counted.
  • Step 304 predicting whether the uplink signal is to exit or enter the demodulation window, if it is to enter into the demodulation window, returning to Step 302, and if it is to exit the demodulation window, turning to Step 305.
  • the uplink timing synchronization out-of- window detection module 203 judges whether a difference between the variation of the timing advance corresponding to the prediction period and a reference downlink timing variation falls within the range of (n - n 0 , n), if yes, determines that the signal is to enter into the demodulation window and otherwise the signal is to exit the demodulation window.
  • the reference downlink timing variation is a difference between the variation of D doubled corresponding to the prediction period and errl ⁇ dlsc) , wherein errl ⁇ dlsc) is a downlink timing synchronization error within the prediction period.
  • the 203 may also judge whether a difference between the variation of the timing advance corresponding to the prediction period and the reference downlink timing variation meets any one of > n and ⁇ - ⁇ 0 , ⁇ ' yes, determine that the signal is to exit demodulation window and otherwise the signal is to enter into the demodulation window.
  • > n the condition > n is met, the UL signal is predicted to be forward-out-of-window at the base station demodulation window, and when the condition ⁇ n - n 0 is met, the UL signal is predicted to be backward-out-of- window at the base station demodulation window.
  • Step 305 updating the current timing advance, and returning to Step
  • the uplink timing synchronization out-of-window detection module 203 transmits a variation of the timing advance to the uplink timing synchronization module 201.
  • the uplink timing synchronization module 201 uses the variation of the timing advance as the variation of the timing advance corresponding to the just-ended prediction period, so as to count in Step 302 the variation of the timing advance corresponding to a prediction period next to the just-ended prediction period, and updates the current timing advance in according with the variation of the timing advance, i.e., adds the timing advance of the prediction reference time to the variation of the timing advance so as to obtain the updated current timing advance.
  • the UL signal may be transmitted by the UE in accordance with the current timing advance updated in the uplink timing synchronization module 201.
  • the present invention further provides an uplink transmission device for use in a TDD mode CDMA system, comprising:
  • a receiving module 401 configured to receive an uplink timing synchronization shift command
  • a first determining module 402 configured to determine a current timing advance in accordance with the uplink timing synchronization shift command
  • a judging module 403 configured to judge whether the current timing advance meets a prediction condition where an uplink signal is to enter into a demodulation window, so as to obtain a first judgment result
  • a transmitting module 404 configured to, when the first judgment result is yes, transmit the uplink signal in accordance with the current timing advance; and an updating and transmitting module 405, configured to, when the first judgment result is no, update the current timing advance so that the updated current timing advance meets the prediction condition where the uplink signal is to enter into the demodulation, and transmit the uplink signal in accordance with the updated current timing advance.
  • the device may further comprise:
  • a second determining module 406 configured to determine a prediction reference time before the receiving module 401 receives the uplink timing
  • the prediction condition where the uplink signal is to enter into the demodulation window includes: a difference between a first timing advance variation and a first reference downlink timing variation falls within a prediction range where an uplink signal is to enter into the demodulation window.
  • the first timing advance variation is a variation of the current timing advance relative to an initial timing advance, and the initial timing advance is a timing advance for the prediction reference time.
  • the first reference downlink timing variation is double a first variation of a distance D from a current base station to a terminal relative to an initial D, or a difference between the first variation double and a first correction value.
  • the initial D is that of the prediction reference time
  • the first correction value is a downlink timing synchronization error.
  • the updating and transmitting module 405 may comprise:
  • an updating unit 4051 configured to update the current timing advance so that a difference between a second timing advance variation and the first reference downlink timing variation falls within the prediction range where the uplink signal is to enter into the demodulation window, wherein the second timing advance variation is a variation of the updated current timing advance relative to the initial timing advance;
  • a transmitting unit 4052 configured to transmit the uplink signal in accordance with the updated current timing advance.
  • the second determining module 406 may comprise:
  • a judging unit 4061 configured to, before the receiving module 401 receives the uplink timing synchronization shift command, judge whether an entry condition is met, so as to obtain a second judgment result;
  • a determining unit 4062 configured to, before the receiving module 401receives the uplink timing synchronization shift command, determine the prediction reference time when the second judgment result is yes.
  • the device may further comprise: a returning module 407, configured to, after the second determining module 406 determines a prediction reference value, returns to the second
  • the present invention further provides a terminal which comprises the above-mentioned uplink transmission device.

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

Abstract

L'invention concerne un procédé et un dispositif de transmission en liaison montante et un terminal. Le procédé consiste à recevoir une commande de décalage de synchronisation de temporisation de liaison montante; à déterminer une avance de temporisation actuelle en fonction de la commande de décalage de synchronisation de temporisation de liaison montante; à évaluer si l'avance de temporisation actuelle satisfait une condition de prédiction dans laquelle le signal de liaison montante doit entrer dans une fenêtre de démodulation afin d'obtenir un premier résultat d'évaluation; à transmettre le signal de liaison montante en fonction de l'avance de temporisation actuelle lorsque le premier résultat d'évaluation est positif; et à mettre à jour l'avance de temporisation actuelle lorsque le premier résultat d'évaluation n'est pas tel que l'avance de temporisation actuelle mise à jour satisfait la condition de prédiction lorsque le signal de liaison montante doit entrer dans une fenêtre de démodulation, et à transmettre le signal de liaison montante en fonction de l'avance de temporisation actuelle mise à jour. L'invention concerne également une voie de prédiction et de prévention lorsqu'un signal de liaison montante va au-delà de la plage d'une fenêtre de démodulation de station de base, ce qui permet de réduire l'éventualité que le signal de liaison montante dépasse la fenêtre de démodulation de station de base et améliore la fiabilité de la liaison montante.
PCT/CN2013/071222 2013-01-31 2013-01-31 Procédé et dispositif de transmission en liaison montante et terminal Ceased WO2014117372A1 (fr)

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PCT/CN2013/071222 WO2014117372A1 (fr) 2013-01-31 2013-01-31 Procédé et dispositif de transmission en liaison montante et terminal

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EP3673587A1 (fr) * 2017-08-22 2020-07-01 Fraunhofer Gesellschaft zur Förderung der Angewand Système de communication sans fil, station de base, et dispositif côté utilisateur
US20210289463A1 (en) * 2018-09-28 2021-09-16 Huawei Technologies Co., Ltd. Uplink signal transmission method and apparatus
CN115942446A (zh) * 2021-08-04 2023-04-07 大唐移动通信设备有限公司 信息传输方法、装置、终端及基站

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WO2012134071A2 (fr) * 2011-03-29 2012-10-04 Lg Electronics Inc. Procédé et appareil de gestion d'alignement temporel en liaison montante
US20120300752A1 (en) * 2011-05-27 2012-11-29 Pantech Co., Ltd. Apparatus and method for performing uplink synchronization in wireless communication system

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CN101631010A (zh) * 2009-08-04 2010-01-20 上海华为技术有限公司 对lte下行重传数据时间提前量的处理方法和装置
CN102076077A (zh) * 2009-11-24 2011-05-25 中兴通讯股份有限公司 一种上行同步控制方法、系统和基站
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3673587A1 (fr) * 2017-08-22 2020-07-01 Fraunhofer Gesellschaft zur Förderung der Angewand Système de communication sans fil, station de base, et dispositif côté utilisateur
US11363545B2 (en) 2017-08-22 2022-06-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Wireless communication system, base-station and user-side-device
US20210289463A1 (en) * 2018-09-28 2021-09-16 Huawei Technologies Co., Ltd. Uplink signal transmission method and apparatus
US12022417B2 (en) * 2018-09-28 2024-06-25 Huawei Technologies Co., Ltd. Uplink signal transmission based on timing advance adjustment
CN115942446A (zh) * 2021-08-04 2023-04-07 大唐移动通信设备有限公司 信息传输方法、装置、终端及基站

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