WO2015089833A1 - Programmation entre porteuses et émission d'accusés de réception - Google Patents

Programmation entre porteuses et émission d'accusés de réception Download PDF

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Publication number
WO2015089833A1
WO2015089833A1 PCT/CN2013/090127 CN2013090127W WO2015089833A1 WO 2015089833 A1 WO2015089833 A1 WO 2015089833A1 CN 2013090127 W CN2013090127 W CN 2013090127W WO 2015089833 A1 WO2015089833 A1 WO 2015089833A1
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WO
WIPO (PCT)
Prior art keywords
downlink
consecutive subframes
scheduling
acknowledgment
secondary cell
Prior art date
Application number
PCT/CN2013/090127
Other languages
English (en)
Inventor
Haipeng Lei
Juejia Zhou
Original Assignee
Nokia Technologies Oy
Nokia (China) Investment 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 Nokia Technologies Oy, Nokia (China) Investment Co., Ltd. filed Critical Nokia Technologies Oy
Priority to PCT/CN2013/090127 priority Critical patent/WO2015089833A1/fr
Publication of WO2015089833A1 publication Critical patent/WO2015089833A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • 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

  • Various communication systems may benefit from cross-carrier scheduling and acknowledgement transmission.
  • third generation partnership project (3 GPP) long term evolution (LTE)-advanced (LTE- A) release 12 (Rel-12) may benefit from cross-carrier scheduling and hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK) transmission for LTE time division duplex (TDD) - frequency division duplex (FDD) joint operation.
  • 3 GPP third generation partnership project
  • LTE long term evolution
  • HARQ-ACK hybrid automatic repeat request
  • TDD time division duplex
  • FDD frequency division duplex
  • LTE supports duplex modes of both FDD and TDD. While the interworking mechanisms between LTE FDD and TDD have been specified, the behavior of terminals simultaneously connected to the network on two or more bands with different duplex modes has not been specified. Efficient TDD and FDD spectrum usage and utilization of different technologies jointly may be valuable in order to cope with increased throughput and capacity needs. LTE TDD-FDD joint operations, thus, may be fully utilized to improve system performance and user experience. In LTE FDD - TDD carrier aggregation (CA) deployment scenarios either TDD or FDD cell may be as PCell and therefore, support for generic LTE FDD- TDD CA would be needed.
  • CA carrier aggregation
  • the UE shall upon detection of a PDSCH transmission or a PDCCH indicating downlink SPS release within subframe(s) n - k , where k e K and K is defined in Table 10.1-1 intended for the UE and for which ACK/NACK response shall be provided, transmit the ACK/NACK response in UL subframe n.
  • a method can include determining a number of consecutive subframes to schedule simultaneously in a secondary cell.
  • the method can also include providing a scheduling counter in control information, wherein the scheduling counter is configured to indicate the number of consecutive subframes.
  • a method can include obtaining a scheduling counter from control information, wherein the scheduling counter is configured to indicate a number of consecutive subframes to be scheduled simultaneously in a secondary cell. The method can also include determining the number of consecutive subframes that are scheduled in the secondary cell based on the scheduling counter.
  • An apparatus can include at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code can be configured to, with the at least one processor, cause the apparatus at least to determine a number of consecutive subframes to schedule simultaneously in a secondary cell.
  • the at least one memory and the computer program code can also be configured to, with the at least one processor, cause the apparatus at least to provide a scheduling counter in control information, wherein the scheduling counter is configured to indicate the number of consecutive subframes.
  • An apparatus in certain embodiments, can include at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code can be configured to, with the at least one processor, cause the apparatus at least to obtain a scheduling counter from control information, wherein the scheduling counter is configured to indicate a number of consecutive subframes to be scheduled simultaneously in a secondary cell.
  • the at least one memory and the computer program code can also be configured to, with the at least one processor, cause the apparatus at least to determine the number of consecutive subframes that are scheduled in the secondary cell based on the scheduling counter.
  • an apparatus can include means for determining a number of consecutive subframes to schedule simultaneously in a secondary cell.
  • the apparatus can also include means for providing a scheduling counter in control information, wherein the scheduling counter is configured to indicate the number of consecutive subframes.
  • an apparatus can include means for obtaining a scheduling counter from control information, wherein the scheduling counter is configured to indicate a number of consecutive subframes to be scheduled simultaneously in a secondary cell.
  • the apparatus can also include means for determining the number of consecutive subframes that are scheduled in the secondary cell based on the scheduling counter.
  • a non- transitory computer-readable medium can be encoded with instructions that, when executed in hardware, perform a process.
  • the process can include determining a number of consecutive subframes to schedule simultaneously in a secondary cell.
  • the process can also include providing a scheduling counter in control information, wherein the scheduling counter is configured to indicate the number of consecutive subframes.
  • a computer program product can, in certain embodiments, encode instructions for performing a process.
  • the process can include obtaining a scheduling counter from control information, wherein the scheduling counter is configured to indicate a number of consecutive subframes to be scheduled simultaneously in a secondary cell.
  • the process can also include determining the number of consecutive subframes that are scheduled in the secondary cell based on the scheduling counter.
  • Figure 1 illustrates cross-carrier scheduling when a time division duplex cell is primary and a frequency division duplex cell is secondary.
  • Figure 2 illustrates an example for SCell DL scheduling, according to certain embodiments.
  • Figure 3 illustrates acknowledgment and negative acknowledgment generation and transmission according to certain embodiments.
  • Figure 4 illustrates a method according to certain embodiments.
  • Figure 5 illustrates a system according to certain embodiments.
  • Certain embodiments may support LTE FDD - TDD CA deployment scenarios when either a TDD cell or an FDD cell is configured as the primary cell (PCell). These situations may involve a number of challenges.
  • PCell can schedule SCell by any conventional cross-carrier scheduling method, since FDD PCell may have the most DL subframes in each radio frame, while TDD SCell can support up to 9 DL subframes including special subframe(s).
  • TDD cell is configured as PCell and FDD cell is configured as SCell, due to PCell having fewer DL subframes than SCell, some DL subframes in SCell may not conventionally be cross-carrier scheduled by PCell.
  • Figure 1 illustrates cross-carrier scheduling when a TDD cell is configured to provide a primary component carrier (PCC) and an FDD cell is configured to provide a secondary component carrier (SCC).
  • PCC primary component carrier
  • SCC secondary component carrier
  • certain embodiments address SCell DL scheduling when PCell is configured with TDD and SCell is configured with FDD for TDD-FDD joint operation. Certain embodiments may, in view of such scheduling improvements, provide an improved DL peak data rate.
  • certain embodiments provide a scheme for cross-carrier scheduling on FDD SCell by TDD PCell for LTE TDD-FDD joint operation when PCell is configured with TDD and SCell is configured with FDD.
  • the details of certain embodiments can be summarized as follows.
  • a scheduling counter can be contained in a PCell downlink control information (DO) format 1/1A/1B/1D/2/2A/2B/2C/2D for SCell downlink scheduling.
  • the SC can be used to indicate the number of the following consecutive downlink subframes, including the current subframe, to be scheduled on SCell.
  • the field of a HARQ process number can be used to indicate the HARQ process number of the first DL HARQ process in these consecutive subframes.
  • the HARQ process number indication for each following DL consecutive subframe, within the scope of the SC, can be incremented by one. For example, if the SC is 4, then the HARQ process number for the first subframe can be as indicated by the field, the next consecutive subframe can have the HARQ process number plus one, and so on, with the fourth of the four consecutive subframes having a HARQ process number that is the original HARQ process number plus three.
  • A/N acknowledgement/negative acknowledgment bits corresponding to each SCell DL subframe from, for example, subframe 9 in a current radio frame (N) to subframe 8 in a next radio frame (N+1).
  • PDCCH physical downlink control channel
  • SPS semi-persistent scheduling
  • PDSCH physical downlink shared channel
  • a device can generate 10 A/N bits in single-codeword transmission mode or two-codeword transmission mode with spatial bundling, or 20 A/N bits in two-codeword transmission mode without spatial bundling.
  • the generated A/N bits for SCell can be concatenated with A/N bits for PCell and transmitted in for example, subframe 2 in the radio frame (N+2) by PUCCH format 3 on PCell.
  • downlink assignment index (DAI) fields in the PDCCH typically assigned for scheduled PDSCH or PDCCH indicating SPS release can instead be used as SC to indicate the number of the following consecutive downlink subframes, including the current subframe, to be scheduled on SCell.
  • the UE can assume that the same physical resource block (PRB) and modulation and coding scheme (MCS) used in the SCell DL subframes within the scope limited by the SC.
  • PRB physical resource block
  • MCS modulation and coding scheme
  • the transmit power control (TPC) fields in the PDCCH typically assigned for scheduled PDSCH or PDCCH indicating SPS release sent from subframe 9 in the current radio frame to subframe 8 in next radio frame can instead be used to indicate the PUCCH resource value from one of the four resource values configured by higher layers.
  • the UE can assume that the same TPC is transmitted on all PDCCH assigned for scheduled PDSCH or PDCCH indicating SPS release sent from subframe 9 in the current radio frame to subframe 8 in next radio frame for PUCCH resource indication.
  • the UE can initially detect the SC. The UE can then receive the current and following consecutive downlink subframes on SCell indicated by SC.
  • whether the scheduling counter is contained in PCell DL grant signaling can be configured and signaled by a high layer. In this way, the UE can clearly and unambiguously know the existence of an SC indication.
  • figure 2 illustrates an example for SCell DL scheduling, according to certain embodiments.
  • the number of PCell UL subframes can be equal to 4.
  • DL subframes in SCell with same subframe number as PCell UL subframes may not be able to be scheduled by PCell.
  • 5 in this case DL subframes 2, 3, 7 and 8 in SCell may not be able to be scheduled by PCell configured with TDD UL/DL configuration 1.
  • a scheduling counter can be contained in the PCell DCI format 1/1A/1B/1D/2/2A/2B/2C/2D for SCell downlink scheduling.
  • the SC can be l o used to indicate the number of the following consecutive downlink subframes, including the current subframe, to be scheduled on SCell.
  • a mapping table of SC value is shown in Table 1.
  • a SC may have a most significant bit (MSB) and a least significant bit (LSB) that encode a value.
  • MSB most significant bit
  • LSB least significant bit
  • the range of values is one to four, although other options are possible.
  • the field of the HARQ process number can be used to explicitly indicate the HARQ process number of the first DL HARQ process in these consecutive subframes.
  • the HARQ process number indication for each following DL consecutive subframe can be implicitly indicated, namely that the HARQ process number of each of these consecutive subframes can correspond to that of the preceding subframe plus one.
  • SCell DL subframe 0 can be cross-carrier scheduled by PCell DL subframe 0 with SC value (SCV) equal to "1".
  • SCell DL subframes 1, 2 and 3 can be simultaneously cross-carrier scheduled by PCell DL subframe 1 with SC value equal to "3".
  • the SC can also be used even so that some SCell DL subframes can be cross-carrier scheduled by several PCell DL subframes.
  • SCell DL subframe 5, 6, 7 and 8 can be simultaneously cross-carrier scheduled by PCell DL subframe 5 with SC value equal to "4". This can also be true when PCell is configured with TDD UL/DL configuration 0. In such case, SC value can be set to 4 in order to schedule the SCell DL subframe 2, 3 and 4 whose corresponding subframe in PCell are consecutive uplink.
  • Figure 3 illustrates A/N generation and transmission according to certain embodiments.
  • ten A/N bits corresponding to each SCell DL subframe from subframe 9 in the current radio frame (N) to subframe 8 in the next radio frame (N+l) can be concatenated.
  • a corresponding A/N bit can be mapped to DTX.
  • 10 A/N bits can be generated in single-codeword transmission mode or two-codeword transmission mode with spatial bundling.
  • 20 A/N bits can be generated in two-codeword transmission mode without spatial bundling.
  • the generated A/N bits for SCell can be concatenated with A/N bits for PCell.
  • the concatenated bits can then be transmitted in subframe 2 in the appropriate radio frame (N+2) by PUCCH format 3 on PCell.
  • DAI fields in the PDCCH typically assigned for scheduled PDSCH or PDCCH indicating SPS release can instead be reused as SC to indicate the number of the following consecutive downlink subframes, including the current subframe, to be scheduled on SCell.
  • the UE can assume that same PRB and MCS used in the SCell DL subframes within the scope limited by SC. Alternatively, two new bits can be introduced as SC.
  • TPC fields in the PDCCH typically assigned for scheduled PDSCH or PDCCH indicating SPS release sent from subframe 9 in the current radio frame to subframe 8 in next radio frame can instead be used to indicate the PUCCH resource value from one of the four resource values configured by, for example, higher layers.
  • the UE can assume that the same TPC is transmitted on all PDCCH assigned for scheduled PDSCH or PDCCH indicating SPS release sent from subframe 9 in the current radio frame to subframe 8 in next radio frame for PUCCH resource indication.
  • the UE can first detect the SC. Then, the UE can receive the current and following consecutive downlink subframes on the SCell as indicated by the SC.
  • the fact of whether the scheduling counter is contained in PCell DL grant signaling can be configured and signaled by a high layer. In this way, the UE can be informed of the existence of an SC indication.
  • Various embodiments may provide different benefits and/or advantages. For example, certain embodiments may provide the benefit associated with TDD-FDD joint operation. Moreover, certain embodiments may permit systems to reach peak data rate.
  • Figure 4 illustrates a method according to certain embodiments.
  • the method can include, at 410, determining a number of consecutive subframes to schedule simultaneously in a secondary cell downlink.
  • the method can include, at 420, providing a scheduling counter in downlink control information.
  • Downlink control information can be one example of control information that is configured to control scheduling.
  • the scheduling counter can be configured to indicate the number of consecutive subframes.
  • the method can further include, at 430, indicating a hybrid automatic repeat request process number of a first downlink hybrid automatic repeat request process in the consecutive subframes.
  • the scheduling counter can be provided in a downlink assignment indicator field in a physical downlink control channel assigned for scheduled physical downlink shared channel or physical downlink control channel indicating semi-persistent scheduling release.
  • the method can additionally include, at 440, providing a physical uplink control channel resource value in a transmit power control field in a physical downlink control channel.
  • the method can also include, at 405, initiating signaling to a user equipment to indicate that the scheduling counter is or will be contained in primary cell downlink grant signaling. This initiating can immediately lead to signaling of the indication that the scheduling counter is or will be contained in the PCell downlink grant signaling.
  • the method can further include, at 450, a user equipment receiving the signaling that the SC is being used or will be used. Moreover, the method can include, at 460, obtaining a scheduling counter from downlink control information.
  • the scheduling counter can be configured to indicate a number of consecutive subframes to be scheduled simultaneously in a secondary cell downlink.
  • the method can also include, at 470, the user equipment determining the number of consecutive subframes that are scheduled in the secondary cell downlink based on the scheduling counter.
  • the method can further include, at 480, obtaining the hybrid automatic repeat request process number of the first downlink hybrid automatic repeat request process in the consecutive subframes. Moreover, the method can include, at 485, incrementing the hybrid automatic repeat request process number by one for each next consecutive subframe of the consecutive subframes.
  • the method can include, at 490, concatenating acknowledgment/ negative acknowledgment bits for each secondary cell downlink subframe.
  • the method can further include, at 495, further concatenating the acknowledgment/negative acknowledgment bits for each secondary cell downlink subframe with acknowledgment/negative acknowledgment bits for a primary cell.
  • the method can additionally include, at 497, transmitting the acknowledgment/negative acknowledgment bits for each secondary cell downlink subframe and the acknowledgment/negative acknowledgment bits for the primary cell on the primary cell.
  • Figure 5 illustrates a system according to certain embodiments of the invention. It should be understood that each block of the flowchart of Figure 4 and any combination thereof may be implemented by various means or their combinations, such as hardware, software, firmware, one or more processors and/or circuitry.
  • a system may include several devices, such as, for example, network element 510 and user equipment (UE) or user device 520.
  • the system may include more than one UE 520 and more than one network element 510, although only one of each is shown for the purposes of illustration.
  • a network element can be an access point, a base station, an eNode B (eNB), server, host or any of the other network elements discussed herein.
  • eNB eNode B
  • Each of these devices may include at least one processor or control unit or module, respectively indicated as 514 and 524.
  • At least one memory may be provided in each device, and indicated as 515 and 525, respectively.
  • the memory may include computer program instructions or computer code contained therein.
  • One or more transceiver 516 and 526 may be provided, and each device may also include an antenna, respectively illustrated as 517 and 527. Although only one antenna each is shown, many antennas and multiple antenna elements may be provided to each of the devices. Other configurations of these devices, for example, may be provided.
  • network element 510 and UE 520 may be additionally configured for wired communication, in addition to wireless communication, and in such a case antennas 517 and 527 may illustrate any form of communication hardware, without being limited to merely an antenna.
  • some network elements 510 may be solely configured for wired communication, and such cases antenna 517 may illustrate any form of wired communication hardware, such as a network interface card.
  • Transceivers 516 and 526 may each, independently, be a transmitter, a receiver, or both a transmitter and a receiver, or a unit or device that may be configured both for transmission and reception.
  • the transmitter and/or receiver may also be implemented as a remote radio head which is not located in the device itself, but in a mast, for example.
  • the operations and functionalities may be performed in different entities, such as nodes, hosts or servers, in a flexible manner. In other words, division of labor may vary case by case.
  • One or more functionalities may also be implemented as a virtual application that is as software that can run on a server.
  • a user device or user equipment may be a mobile station (MS) such as a mobile phone or smart phone or multimedia device, a computer, such as a tablet, provided with wireless communication capabilities, personal data or digital assistant (PDA) provided with wireless communication capabilities, portable media player, digital camera, pocket video camera, navigation unit provided with wireless communication capabilities or any combinations thereof.
  • MS mobile station
  • PDA personal data or digital assistant
  • an apparatus such as a node or user device, may include means for carrying out embodiments described above in relation to Figure 4.
  • Processors 514 and 524 may be embodied by any computational or data processing device, such as a central processing unit (CPU), digital signal processor (DSP), application specific integrated circuit (ASIC), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), digitally enhanced circuits, or comparable device or a combination thereof.
  • the processors may be implemented as a single controller, or a plurality of controllers or processors.
  • the implementation may include modules or unit of at least one chip set, for example, procedures, functions, and so on.
  • Memories 515 and 525 may independently be any suitable storage device, such as a non-transitory computer-readable medium.
  • a hard disk drive (HDD), solid state drive (SSD), random access memory (RAM), flash memory, or other suitable memory may be used.
  • the memories may be combined on a single integrated circuit as the processor, or may be separate therefrom.
  • the computer program instructions may be stored in the memory and which may be processed by the processors can be any suitable form of computer program code, for example, a compiled or interpreted computer program written in any suitable programming language.
  • the memory or data storage entity may be internal but may also be external or a combination thereof, such as in the case when additional memory capacity is obtained from a service provider.
  • the memory may be fixed or removable.
  • the memory and the computer program instructions may be configured, with the processor for the particular device, to cause a hardware apparatus such as network element 510 and/or UE 520, to perform any of the processes described above (see, for example, Figure 4). Therefore, in certain embodiments, a non-transitory computer-readable medium may be encoded with computer instructions or one or more computer program (such as added or updated software routine, applet or macro) that, when executed in hardware, may perform a process such as one of the processes described herein.
  • Computer programs may be coded by a programming language, which may be a high-level programming language, such as objective-C, C, C++, C#, Java, or the like, or a low-level programming language, such as a machine language, or assembler. Alternatively, certain embodiments of the invention may be performed entirely in hardware.
  • Figure 5 illustrates a system including a network element 510 and a UE 520
  • embodiments of the invention may be applicable to other configurations, and configurations involving additional elements, as illustrated and discussed herein.
  • multiple user equipment devices and multiple network elements may be present, or other nodes providing similar functionality, such as nodes that combine the functionality of a user equipment and an access point, such as a relay node.
  • PCell Primary cell [0093] PCell Primary cell [0094] PCFICH Physical control format indicator channel

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

Abstract

L'invention a pour objet de faire bénéficier divers systèmes de communication d'une programmation entre porteuses et d'une émission d'accusés de réception. Par exemple, la révision 12 (Rel-12) du Long Term Evolution (LTE) avancé (LTE-A) du projet en partenariat de troisième génération (3GPP) peut bénéficier d'une programmation entre porteuses et d'une émission d'accusé de réception (HARQ-ACK) de demande de répétition automatique hybride (HARQ) pour un fonctionnement conjoint LTE en duplex par répartition en temps (TDD) - duplex par répartition en fréquence (FDD). Selon certains modes de réalisation, un procédé peut comprendre l'étape consistant à déterminer un nombre de sous-trames consécutives à programmer simultanément dans une cellule secondaire. Le procédé peut également comprendre l'étape consistant à mettre en place un compteur de programmation dans des informations de commande, le compteur de programmation étant configuré pour indiquer le nombre de sous-trames consécutives.
PCT/CN2013/090127 2013-12-20 2013-12-20 Programmation entre porteuses et émission d'accusés de réception WO2015089833A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170013673A1 (en) * 2014-02-19 2017-01-12 Ntt Docomo, Inc. Mobile communication system and user equipment
WO2017027997A1 (fr) * 2015-08-14 2017-02-23 Lenovo Innovations Limited (Hong Kong) Détermination d'une temporisation de réponse d'accusé de réception de demande de répétition automatique hybride pour une cellule secondaire de duplexage à répartition dans le temps (tdd) avec une agrégation de porteuses

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1492605A (zh) * 2002-10-23 2004-04-28 华为技术有限公司 一种时分双工系统的初始上行同步方法
CN101453262A (zh) * 2007-12-06 2009-06-10 大唐移动通信设备有限公司 下行同步方法及装置
CN101617480A (zh) * 2007-02-22 2009-12-30 三星电子株式会社 在通信系统中配置帧的方法和系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1492605A (zh) * 2002-10-23 2004-04-28 华为技术有限公司 一种时分双工系统的初始上行同步方法
CN101617480A (zh) * 2007-02-22 2009-12-30 三星电子株式会社 在通信系统中配置帧的方法和系统
CN101453262A (zh) * 2007-12-06 2009-06-10 大唐移动通信设备有限公司 下行同步方法及装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170013673A1 (en) * 2014-02-19 2017-01-12 Ntt Docomo, Inc. Mobile communication system and user equipment
US10057930B2 (en) * 2014-02-19 2018-08-21 Ntt Docomo, Inc. Mobile communication system and user equipment
WO2017027997A1 (fr) * 2015-08-14 2017-02-23 Lenovo Innovations Limited (Hong Kong) Détermination d'une temporisation de réponse d'accusé de réception de demande de répétition automatique hybride pour une cellule secondaire de duplexage à répartition dans le temps (tdd) avec une agrégation de porteuses

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