WO2017147833A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2017147833A1
WO2017147833A1 PCT/CN2016/075409 CN2016075409W WO2017147833A1 WO 2017147833 A1 WO2017147833 A1 WO 2017147833A1 CN 2016075409 W CN2016075409 W CN 2016075409W WO 2017147833 A1 WO2017147833 A1 WO 2017147833A1
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WIPO (PCT)
Prior art keywords
indication information
subframe
base station
dwpts
configuration
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PCT/CN2016/075409
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English (en)
Chinese (zh)
Inventor
李晓翠
徐凯
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华为技术有限公司
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Priority to JP2018545876A priority Critical patent/JP2019512922A/ja
Priority to CN201680080824.1A priority patent/CN108604925B/zh
Priority to PCT/CN2016/075409 priority patent/WO2017147833A1/fr
Publication of WO2017147833A1 publication Critical patent/WO2017147833A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for transmitting data in the field of communications.
  • the spectrum used by wireless communication systems is divided into two categories, a licensed spectrum and an unlicensed spectrum.
  • a licensed spectrum For commercial mobile communication systems, operators need to auction the licensed spectrum, and then obtain the authorization to use the corresponding spectrum to carry out mobile communication operations.
  • Unlicensed spectrum does not require an auction, and anyone can legally use unlicensed spectrum, such as Wireless Fidelity ("WiFi") devices in the 2.4 GHz and 5 GHz bands.
  • WiFi Wireless Fidelity
  • the carrier on the licensed spectrum is called the authorized carrier
  • the carrier on the unlicensed spectrum is called the unlicensed carrier.
  • LAA-LTE Lens-Assisted Access Using Long Term Evolution
  • LBT Listen Before Talk
  • CSMA carrier Sense Multiple Access
  • the base station first sends an incomplete subframe, the time of the incomplete subframe. Continues until the end of the corresponding subframe on the authorized carrier, and then starts transmitting the complete subframe. That is, the first subframe is incomplete, the next subframe is complete, and the remaining subframes and the subframes on the licensed carrier are aligned in time, but the last subframe may also be Incomplete.
  • the configuration of the Downlink Pilot Time Slot may be used to design the last incomplete subframe, but how to indicate the DwPTS configuration of the last incomplete subframe becomes Problems to be solved.
  • Embodiments of the present invention provide a method and apparatus for transmitting data, which can indicate DwPTS configuration by using indication information.
  • an embodiment of the present invention provides a method for transmitting data, where the method includes:
  • indication information indicating a downlink pilot time slot DwPTS configuration of a last incomplete subframe of the unlicensed carrier
  • the base station sends the indication information to the user equipment UE by referring to the subframe.
  • a base station sends indication information to a UE by using a reference subframe, where the indication information indicates a DwPTS configuration of a last incomplete subframe of the unlicensed carrier, In this way, the UE can determine the DwPTS configuration according to the indication information, and does not need to determine the DwPTS configuration through detection, thereby saving power consumption of the UE.
  • the reference subframe is the last incomplete subframe of the unlicensed carrier, and the base station sends the indication information to the UE by using the reference subframe, including:
  • the base station sends the indication information to the UE through the physical hybrid automatic retransmission indication channel PHICH or the physical downlink control channel PDCCH in the DwPTS of the last incomplete subframe.
  • the base station sends the indication information to the UE through the last incomplete subframe of the unlicensed carrier, so that the UE can determine the DwPTS configuration according to the indication information, and does not need to determine the DwPTS through the detection. Configuration can save UE's power consumption.
  • the reference subframe is any one of the complete subframes of the unlicensed carrier, and the base station sends the indication information to the UE by using the reference subframe, including:
  • the base station sends indication information to the UE through the PHICH or PDCCH of any one of the complete subframes.
  • the base station sends the indication information to the UE through any one of the unlicensed carriers, so that the UE can determine the DwPTS configuration according to the indication information, and does not need to determine the DwPTS configuration through detection. Can save the power consumption of the UE.
  • the reference subframe is a previous complete complete subframe of the last incomplete subframe of the unlicensed carrier, and the base station sends the indication information to the UE by using the reference subframe, including:
  • the base station sends indication information to the UE through the PHICH or PDCCH of any one of the complete subframes.
  • the reference subframe is any one of the subframes of the authorized carrier, and the base station sends the indication information to the UE by using the reference subframe, including:
  • the base station transmits indication information to the UE through the PDCCH of any one of the subframes.
  • the base station sends the indication information to the user equipment UE by using any one of the subframes of the authorized carrier, so that the UE can determine the DwPTS configuration according to the indication information, and does not need to determine the DwPTS configuration through detection. Can save the power consumption of the UE.
  • the reference subframe is the last subframe of the authorized carrier, and the base station sends the indication information to the UE by using the reference subframe, including:
  • the base station transmits indication information to the UE through the PDCCH of the last subframe.
  • the DwPTS configuration includes one of six symbol numbers.
  • the indication information is a 3-bit character, and the 3-bit character indicates a DwPTS configuration of the last incomplete subframe of the unlicensed carrier.
  • the indication information is an index corresponding to the DwPTS configuration, and the index indicates a DwPTS configuration of the last incomplete subframe of the unlicensed carrier.
  • an apparatus for transmitting data including:
  • a determining unit configured to determine indication information indicating a downlink pilot time slot DwPTS configuration of a last incomplete subframe of the unlicensed carrier.
  • a sending unit configured to send the indication information determined by the determining unit to the user equipment UE by using the reference subframe.
  • the apparatus is for performing the method of transmitting data in any of the above-described first aspect or any of the possible implementations of the first aspect.
  • the device can be a base station.
  • an apparatus for transmitting data comprising: a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by the bus system, the memory is for storing instructions for executing the instructions stored by the memory to control the receiver to receive signals and control the sending
  • the transmitter transmits a signal, and when the processor executes the memory stored instructions, the execution causes the processor to perform the method of the first aspect or any of the possible implementations of the first aspect.
  • a computer readable medium for storing a computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • Figure 1 is a schematic diagram of a communication system
  • FIG. 2 is a schematic diagram of an application scenario of an embodiment of the present invention.
  • FIG. 3 is another schematic diagram of an application scenario according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a method of transmitting data according to an embodiment of the present invention.
  • FIG. 5 is another schematic diagram of a method for transmitting data according to an embodiment of the present invention.
  • FIG. 6 is another schematic diagram of a method for transmitting data according to an embodiment of the present invention.
  • FIG. 7 is another schematic diagram of a method for transmitting data according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of an apparatus for transmitting data according to an embodiment of the present invention.
  • FIG. 9 is another schematic diagram of an apparatus for transmitting data according to an embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WIMAX Global Interconnect Worldwide Interoperability for Microwave Access
  • the base station may be a base station (Base Transceiver Station, abbreviated as "BTS”) in GSM or CDMA, or may be a base station (NodeB, abbreviated as “NB”) in WCDMA, or an evolved base station in LTE ( Evolved Node B, abbreviated as "e-NB or e-NodeB", is not limited in the present invention.
  • BTS Base Transceiver Station
  • NB base station
  • e-NB evolved base station in LTE
  • a user equipment may be referred to as a terminal, a mobile station (Mobile Station, or simply "MS"), or a mobile terminal (Mobile Terminal), etc.
  • the UE may be connected to the radio access network ( The Radio Access Network (referred to as "RAN") communicates with one or more core networks.
  • the user equipment may be a mobile phone (or "cellular" phone) or a computer with a mobile terminal, etc., for example, the user equipment It can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice and/or data with a wireless access network.
  • the embodiment of the present invention is only described by taking the LAA-LTE system as an example, but the present invention is not limited thereto, and the method and apparatus according to the embodiment of the present invention may also be applied to other communication systems; similarly, the embodiment of the present invention
  • the base station and the UE in the LAA-LTE system are also taken as an example for description.
  • the present invention is not limited thereto, and the method and apparatus according to the embodiments of the present invention are also applicable to base stations in other communication systems.
  • Figure 1 shows a schematic diagram of a communication system.
  • the UE can communicate with the core network through one or more base stations.
  • the UE 10a in FIG. 1 can communicate with the core network 12 via the base station 110a in the radio access network 11a; the UE 10b can be via the base station 110a in the radio access network 11a or via the radio access network 11b.
  • the base station 110b communicates with the core network 12; the UE 10c can communicate with the core network 12 via the base station 110b in the radio access network 11b.
  • PSTN Public Switched Telephone Network
  • PSTN Public Switched Telephone Network
  • FIG. 2 is a schematic diagram of an application scenario according to an embodiment of the present invention.
  • a base station sends an incomplete subframe in an unlicensed spectrum, and the time of the incomplete subframe continues until the corresponding sub-frame on the licensed spectrum. The frame ends and then begins to send the complete sub-frame.
  • the first subframe transmitted by the base station on the unlicensed spectrum may be incomplete, on the subframe N-1 on the unlicensed carrier.
  • the base station detects that the channel is busy, and can perform a Common Communication Adapter ("CCA") process, and then sends a reserved signal and sends a physical downlink control channel information (Physical Downlink Control Channel, referred to as "PDCCH") or sends The information of the Enhanced Physical Downlink Control Channel (EPDCCH) or the information of the Physical Downlink Shared Channel (PDSCH) is transmitted, and the subsequent subframes may be complete. .
  • the subsequent subframes on the unlicensed spectrum and the subframes on the licensed carrier are aligned in time, but the last sub- A frame, such as subframe N+3 on an unlicensed carrier in Figure 2, may also be incomplete.
  • the subframe 1 and the subframe 6 are respectively a special subframe of the TDD, and the special subframe 1 and the special subframe 6 respectively include a DwPTS, a guard interval ("GP"), and Uplink Pilot Time Slot (UpPTS), in which UpPTS and GP are not used to transmit data, and only DwPTS is used to transmit data and control information, so the physical hybrid automatic retransmission indicator channel is extended.
  • a DwPTS Downlink Pilot Time Slot
  • UpPTS Uplink Pilot Time Slot
  • UpPTS Uplink Pilot Time Slot
  • PHICH Physical Hybrid ARQ Indicator Channel
  • the PHICH is transmitted using two symbols; in the normal PHICH length, in the DwPTS, the PHICH is transmitted using one symbol.
  • the base station can use the configuration of the DwPTS to design the last incomplete subframe, but how to indicate the DwPTS configuration of the last incomplete subframe is an urgent problem to be solved.
  • FIG. 4 is a method for transmitting data according to an embodiment of the present invention. As shown in FIG. 4, the method 100 may be performed by a base station, and the method 100 may include:
  • the base station determines indication information indicating a DwPTS configuration of the last incomplete subframe.
  • the indication information is a 3-bit character indicating a DwPTS configuration of the last incomplete subframe.
  • indication information may also be any bit character or other information, and the present invention does not impose any limitation.
  • the DwPTS is configured in one of six symbol numbers.
  • the DwPTS configuration is represented by the number of symbols: 3, 6, 9, 10, 11, and 12 symbols, respectively, and the base station can indicate the DwPTS configuration with the indication information, that is, the DwPTS is configured to be one of the six symbol numbers.
  • the base station can indicate the DwPTS configuration of the last incomplete subframe by using the indication information. After receiving the indication information, the UE can learn the DwPTS configuration, and the UE does not need to detect the DwPTS configuration sent by the base station, thereby saving the UE's work. Consumption.
  • the base station sends indication information to the UE by using a reference subframe.
  • the base station may send indication information to the UE by referring to the subframe, indicating the DwPTS configuration of the last incomplete subframe, that is, the indication information indicates the DwPTS configuration of the UE.
  • the reference subframe may be the last incomplete subframe of the unlicensed carrier, which may be Any one of the unlicensed carriers may also be any one of the authorized carriers.
  • the base station indicates the DwPTS configuration of the last incomplete subframe by using the reference subframe, so that the UE can determine the DwPTS configuration according to the indication information, which is not required.
  • the power consumption of the UE can be saved.
  • the uplink adopts a Hybrid Automatic Repeat reQuest (HARQ) mode, and its initial transmission and retransmission have fixed time requirements.
  • HARQ Hybrid Automatic Repeat reQuest
  • the PHICH is used to respond to HARQ correct (ACK) or HARQ error (NACK) for data transmitted by a Physical Uplink Shared Channel (“PUSCH").
  • ACK HARQ correct
  • NACK HARQ error
  • the UE transmits the PUSCH in the subframe n
  • the UE will detect the corresponding PHICH in the subframe n+4, and if the received NACK, the retransmission data will be transmitted again in the subframe n+8.
  • the discontinuous transmission causes the HARQ retransmission to be interrupted, and the e-NodeB can only wait for the UE to regain the channel after re-occupying the channel, and the waiting time may be very high. Long, causing data delays.
  • the uplink adopts the asynchronous HARQ operation, and the PHICH is not needed. Therefore, in the embodiment of the present invention, the indication information may be sent by using the PHICH in the DwPTS of the last incomplete subframe, the indication information. Indicates the DwPTS configuration of the last incomplete subframe of the base station.
  • the base station may send the indication information to the UE by using the last incomplete subframe of the unlicensed carrier.
  • the base station may send the indication information to the UE by using a PHICH or a PDCCH in the DwPTS of the last incomplete subframe of the unlicensed carrier.
  • the base station may send the indication information to the UE by using the PHICH in the DwPTS of the last incomplete subframe.
  • CP Downlink common cyclic prefix
  • T s is the reciprocal of the adoption rate
  • each subframe may have 14 orthogonal frequency division multiplexing technologies (Orthogonal Frequency).
  • OFDM symbols occupied by the DwPTS, GP, and UpPTS is different, and the DwPTS may include 3-12 symbols.
  • the base station can indicate the configuration of the DwPTS of the last incomplete subframe by adding a new bit in the PHICH in the DwPTS of the last incomplete subframe or by adding a new bit in the PDCCH in the DwPTS of the last incomplete subframe.
  • DwPTS has 6 different configurations, which are represented by the number of symbols: 3, 6, 9, 10, 11, 12 Symbols.
  • DwPTS configuration index Specific number of symbols Configuration 1 000 3 OFDM symbols Configuration 2 001 6 OFDM symbols Configuration 3 010 9 OFDM symbols Configuration 4 011 10 OFDM symbols Configuration 5 100 11 OFDM symbols Configuration 6 101 12 OFDM symbols
  • the indication information may be an index corresponding to the DwPTS configuration, and the index indicates a DwPTS configuration of the last incomplete subframe of the unlicensed carrier.
  • the configuration of the DwPTS may be indicated by the index "000” as 3 OFDM symbols
  • the configuration of the DwPTS may be indicated by the index "001" as 6 OFDM symbols
  • the configuration of the DwPTS may be indicated by the index "010”.
  • the configuration of the DwPTS may be indicated by the index "011" as 10 OFDM symbols, the configuration of the DwPTS may be indicated by the index "100” as 11 OFDM symbols, and the configuration of the DwPTS may be indicated by the index "101" as 12 OFDM symbols. symbol.
  • the configuration of the DwPTS of the last incomplete subframe of the base station can be obtained by indicating different configuration conditions of the DwPTS or different number of symbols.
  • 3 bits or any number of bits may be added to the PHICH or PDCCH in the DwPTS of the last incomplete subframe of the unlicensed carrier to indicate the configuration of the DwPTS, for example 4 bits or 5 bits, or by in the PHICH or PDCCH. Additional information is added to indicate the configuration of the DwPTS, which is not limited by the present invention.
  • the base station may send the indication information to the UE by using any one of the complete subframes of the unlicensed carrier.
  • the base station may send the indication information to the UE by using a PHICH or a PDCCH of any one of the complete subframes of the unlicensed carrier.
  • the PHICH channel is not used for transmitting ACK/NACK. Therefore, the PHICH channel in any one of the complete subframes before the last subframe can be used to indicate the configuration of the DwPTS of the last incomplete subframe. Can use any one before the last sub-frame
  • the PDCCH in the complete subframe transmits the indication information to the UE.
  • the base station may use the PHICH of the previous adjacent complete subframe of the last incomplete subframe to indicate the configuration of the DwPTS in the last incomplete subframe, but is not limited to the last one.
  • the previous subframe of the complete subframe, any one of the complete subframes before the last incomplete subframe can be used to indicate the configuration of the DwPTS of the last incomplete subframe.
  • the base station may send the indication information to the UE by using any one of the complete subframes of the authorized carrier.
  • the base station may send the indication information to the UE by using the PDCCH of any one of the complete subframes of the authorized carrier.
  • the base station may indicate the DwPTS configuration of the last incomplete subframe of the unlicensed carrier by using the PDCCH of the last subframe of the licensed carrier, but is not limited to the last one.
  • Subframe any complete subframe of the licensed carrier can be used to indicate the DwPTS configuration of the last incomplete subframe of the unlicensed carrier.
  • the base station may add a new bit in the PDCCH of the authorized carrier or multiplex the existing bit as the indication information, and the specific method of indicating the information indicating the DwPTS configuration is the same as the foregoing indication method, and details are not described herein again.
  • the multiplexed existing bit may be the field sending indication information in the Downlink Control Information (DCI), and the present invention does not impose any limitation.
  • DCI Downlink Control Information
  • FIG. 8 is an apparatus 200 for transmitting data according to an embodiment of the present invention.
  • the apparatus 200 shown in FIG. 8 includes a determining unit 210, a transmitting unit 220,
  • the determining unit 210 is configured to determine indication information indicating a DwPTS configuration of the last incomplete subframe of the unlicensed carrier.
  • the sending unit 220 is configured to send the indication information determined by the determining unit 210 to the UE by using the reference subframe.
  • DwPTS is configured as one of six different symbol numbers, specifically represented by the number of symbols: 3, 6, 9, 10, 11, 12 symbols, respectively.
  • the reference subframe is the last incomplete subframe of the unlicensed carrier
  • the sending unit 220 is specifically configured to:
  • the indication information is sent to the UE through the PHICH or PDCCH in the DwPTS of the last incomplete subframe.
  • the reference subframe is any one of the unlicensed carriers
  • the sending unit 220 is specifically configured to:
  • the indication information is sent to the UE through the PHICH or PDCCH of any one of the complete subframes.
  • the reference subframe is any one of the authorized carriers, and the sending unit 220 is specifically configured to:
  • the indication information is transmitted to the UE by the PDCCH of any one of the subframes.
  • the DwPTS configuration includes one of six symbol numbers.
  • the base station indicates the DwPTS configuration of the last incomplete subframe by using the reference subframe, so that the UE can determine the DwPTS configuration according to the indication information, which is not required.
  • the power consumption of the UE can be saved.
  • the apparatus 200 herein is embodied in the form of a functional unit.
  • the term "unit” herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor for executing one or more software or firmware programs (eg, a shared processor, a proprietary processor, or a group). Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • the apparatus 200 may be specifically the base station in the foregoing embodiment, and the apparatus 200 may be used to perform various processes and/or steps corresponding to the base station in the foregoing method embodiments, to avoid Repeat, no longer repeat them here.
  • FIG. 9 shows an apparatus 300 for transmitting data according to an embodiment of the present invention.
  • the device 300 can be a base station, and the device 300 can include a processor 310 and a transmitter 320.
  • the processor 310 is configured to determine indication information by the base station, where the indication information indicates a DwPTS configuration of the last incomplete subframe of the unlicensed carrier.
  • the transmitter 320 is configured to send indication information to the UE by using a reference subframe.
  • the reference subframe is the last incomplete subframe of the unlicensed carrier
  • the transmitter 320 is specifically configured to:
  • the indication information is sent to the UE through the PHICH or PDCCH in the DwPTS of the last incomplete subframe.
  • the reference subframe is any one of the unlicensed carriers, and the transmitter 320 is specific. Used for:
  • the indication information is sent to the UE through the PHICH or PDCCH of any one of the complete subframes.
  • the reference subframe is any one of the authorized carriers, and the transmitter 320 is specifically configured to:
  • the indication information is transmitted to the UE by the PDCCH of any one of the subframes.
  • apparatus 300 can also include a memory 330 coupled to processor 310, a receiver 340 that can be used to store instructions, a storage frame structure, etc., and a receiver 340 that can be used to receive instructions or the like.
  • the processor 310 can be a baseband processor, a communication processor, a digital signal processor, or an application specific integrated circuit or the like.
  • the processor 310 is configured to execute instructions stored by the memory 330.
  • processor 310 transmitter 320, memory 330, receiver 340, etc., in device 300 may be connected by bus system 350.
  • apparatus 300 in FIG. 9 can be used to perform the method in the embodiments of the present invention, and the foregoing and other operations and/or functions of the various parts in the base station are respectively implemented to implement the respective processes of the methods of the base station in FIG. For the sake of brevity, it will not be repeated here.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. You can choose some of them according to actual needs or All units are used to achieve the objectives of the solution of this embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

Abstract

La présente invention concerne un procédé et un dispositif de transmission de données. Le procédé comprend les étapes suivantes : une station de base détermine des informations d'indication, les informations d'indication indiquant la configuration de créneaux temporels pilotes de liaison descendante (DwPTS) d'une sous-trame incomplète finale ; la station de base envoie les informations d'indication à un UE au moyen d'une sous-trame de référence. Le procédé et le dispositif de transmission de données, dans les modes de réalisation de la présente invention, permettent, dans un système LAA-LTE, à des informations d'indication d'indiquer la configuration DwPTS d'une sous-trame incomplète finale ; et une station de base envoie les informations d'indication à un UE au moyen d'une sous-trame de référence afin que l'UE puisse déterminer la configuration DwPTS selon les informations d'indication sans effectuer de détection supplémentaire, et pour permettre de réduire la consommation d'énergie de l'UE.
PCT/CN2016/075409 2016-03-03 2016-03-03 Procédé et dispositif de transmission de données WO2017147833A1 (fr)

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CN104854811A (zh) * 2012-09-26 2015-08-19 交互数字专利控股公司 动态tdd上行链路/下行链路配置方法
CN103916959A (zh) * 2013-01-04 2014-07-09 中国移动通信集团公司 特殊时隙的配置方法、终端、处理方法及基站
WO2015054886A1 (fr) * 2013-10-18 2015-04-23 Nokia Siemens Networks Oy Configuration de liaison montante/descendante dynamique

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