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WO2016029971A1 - Modulation de porteuse en communications - Google Patents

Modulation de porteuse en communications Download PDF

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Publication number
WO2016029971A1
WO2016029971A1 PCT/EP2014/068431 EP2014068431W WO2016029971A1 WO 2016029971 A1 WO2016029971 A1 WO 2016029971A1 EP 2014068431 W EP2014068431 W EP 2014068431W WO 2016029971 A1 WO2016029971 A1 WO 2016029971A1
Authority
WO
WIPO (PCT)
Prior art keywords
predefined time
scheduling
time unit
network node
ptu
Prior art date
Application number
PCT/EP2014/068431
Other languages
English (en)
Inventor
Esa Tapani Tiirola
Kari Pekka Pajukoski
Original Assignee
Nokia Solutions And Networks Oy
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 Solutions And Networks Oy filed Critical Nokia Solutions And Networks Oy
Priority to PCT/EP2014/068431 priority Critical patent/WO2016029971A1/fr
Publication of WO2016029971A1 publication Critical patent/WO2016029971A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • 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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
    • H04L27/2636—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the invention relates to the field of cellular communication systems and, particularly, carrier modulation.
  • OFDM signals involve a high peak-to-average power ratio which may cause the clipping of peaks in transmitted signals due to a limited linear range of high power amplifiers. If the amplifier is operated only in a linear region, i.e. with a large output back-off, an undistorted signal can be transmitted. This, however, leads to a low signal-to-noise ratio in a receiver.
  • Figure 1 is illustrates a wireless communication system to which embodiments of the invention may be applied;
  • FIGS 2 and 3 illustrate signalling diagrams of procedures for single carrier modulation according to an embodiment of the invention
  • FIGS 4 and 5 illustrate processes for single carrier modulation according to some embodiments of the invention
  • Figure 6 illustrates resource allocation for a terminal device according to an embodiment of the invention
  • Figure 7 and 8 illustrate multiplexing within PTU according to some embodiments of the invention
  • Figures 9 and 10 illustrate blocks diagrams of apparatuses according to some
  • a cellular communication system may comprise a radio access network comprising base stations disposed to provide radio coverage in a determined geographical area.
  • the base stations may comprise macro cell base stations 102 arranged to provide terminal devices 106 with the radio coverage over a relatively large area spanning even over several square miles, for example.
  • small area cell base stations 100 may be deployed to provide terminal devices 104 with high data rate services.
  • Such small area cell base stations may be called micro cell base stations, pico cell base stations, or femto cell base stations.
  • the small area cell base stations typically have significantly smaller coverage area than the macro base stations 102.
  • the cellular communication system may operate according to specifications of the 3 rd generation partnership project (3GPP) long-term evolution (LTE) advanced or its evolution version.
  • 3GPP 3 rd generation partnership project
  • LTE long-term evolution
  • the physical layer of LTE is built on top of OFDMA (for downlink) and SC-FDMA (for uplink) technologies.
  • OFDMA enables flexibility in frequency domain multiplexing, inter- symbol-interference ( IS I) free transmission, low-complexity reception (due to the fact that channel equalization may be made in subcarrier wise), and low-complexity MIMO extension.
  • OFDMA is adopted in many areas such as in digital TV (DVB-T and DVB-H) and wireless local area network (WLAN) applications.
  • OFDMA involves high peak-to-average power ratio (PAPR) of a transmitted signal which requires high linearity in the transmitter.
  • PAPR peak-to-average power ratio
  • An amplifier is to stay in a linear area with the use of extra power back-off in order to prevent problems to the output signal and spectrum mask.
  • additional back-off leads to reduced amplifier power efficiency or smaller output power. This may cause the range to be shortened, or when the same average output power level is maintained, the energy is consumed faster due to higher amplifier power consumption.
  • the power efficiency is a reason why 3GPP decided to use OFDMA in the downlink direction but to use the power efficient SC-FDMA in the uplink direction.
  • the power efficiency is used as a design parameter for mobile devices running on their own batteries and having a limited transmit power.
  • CM difference represents the difference in required output back-off (OBO).
  • OBO output back-off
  • PA cost depends on the (linearized) output power. PA cost reduces quite slowly (in the order of a few percent/year) e.g. compared to the cost reduction of baseband processing. Hence, reducing the output back-off has a direct impact to the PA cost. E.g. the 3 dB reduction in the output back-off reduces the PA cost by 50%. For example, assuming a typical 3-sector base station with two power amplifiers per sector (80 W, a 55 $), the total cost of the power amplifiers is 330 $. Assuming that the output back-off is reduced by 3 dB, the total cost of the power amplifiers is reduced by 165 $/site. It is assumed that in DL side, OBO difference between a single carrier and OFDMA is even larger than a CM difference.
  • UEs In the DL side, UEs share the same power amplifier resources (in UL, power amplifier resources are UE-specific). Thus, maintaining single carrier properties of multiplexed DL signals is a challenge. Furthermore, there is a link budget imbalance between UL and DL. This is due to the fact that transmit power difference between UE and eNB may be relatively large (e.g. up to 25 dB). Thus, having a common multiplexing design where single carrier transmission is applied in both UL and DL is a challenge.
  • PAPR peak-to-average power ratio
  • Modern cellular communication systems are wideband systems where a large bandwidth may be scheduled to a single terminal device for the transmission of data.
  • the scheduled resources may be indicated (in frequency) in terms of physical resource blocks or frequency resource blocks.
  • Each frequency resource block has a determined bandwidth and a centre frequency and one or more frequency resource blocks may be scheduled to the terminal device at a time.
  • the frequency resource blocks scheduled to the terminal device may be contiguous and, thus, form a continuous scheduled band for the terminal device.
  • the resource blocks may be non-contiguous in which case the form a non-contiguous band fragmented into a plurality of smaller bands.
  • Figures 2 and 3 illustrate signalling diagrams illustrating methods for communicating in a single carrier operation mode between a base station of a cellular communication system, e.g. base station 100 or 102, and a terminal device of the cellular communication system, e.g. the terminal device 104 or 106.
  • the procedures of Figures 2 and 3 may be carried out between the terminal device and an access node or, more generally, a network node.
  • the network node may be a server computer or a host computer.
  • the server computer or the host computer may generate a virtual network through which the host computer communicates with the terminal device.
  • virtual networking may involve a process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network.
  • Network virtualization may involve platform virtualization, often combined with resource
  • Network virtualization may be categorized as external virtual networking which combines many networks, or parts of networks, into the server computer or the host computer. External network virtualization is targeted to optimized network sharing.
  • Virtual networking Another category is internal virtual networking which provides network-like functionality to the software containers on a single system. Virtual networking may also be used for testing the terminal device.
  • a predefined time unit PTU defining a maximum resource allocation unit in time in downlink is selected in the base station (block 201 ).
  • the base station decides on a resource allocation by scheduling one or more terminal devices.
  • a scheduling periodicity may be one predefined time unit PTU.
  • the base station may cause transmission of a control message to a terminal device, the control message comprising at least one information element indicating the resource allocation scheduled to the terminal device (step 203).
  • the terminal device acquires from the base station the control message comprising the at least one information element indicating the resource allocation scheduled to the terminal device.
  • the base station may cause transmission of one or more further messages to the terminal device by using a single carrier operation mode (step 205).
  • the one or more further messages may comprise a data signal, control signal, a reference signal, or a signal or message of any other suitable signal/message type.
  • the terminal device acquires from the base station the one or more further message by using the single carrier operation mode.
  • a predefined time unit PTU defining a minimum resource allocation unit in time in uplink is selected in the base station (block 301 ).
  • the base station decides on a resource allocation by scheduling one or more terminal devices.
  • a scheduling periodicity may be one predefined time unit PTU.
  • the base station may cause transmission of a control message to a terminal device, the control message comprising at least one information element indicating the resource allocation scheduled to the terminal device (step 303).
  • the terminal device acquires from the base station the control message comprising the at least one information element indicating the resource allocation scheduled to the terminal device.
  • the terminal device may cause transmission of one or more further messages to the base station by using a single carrier operation mode (step 305).
  • the one or more further message may comprise a data signal, control signal, a reference signal, or a signal or message of any other suitable signal/message type.
  • the base station acquires from the terminal device the one or more further messages by using the single carrier operation mode.
  • TDM scheduling is used in downlink.
  • FDM scheduling is used in uplink.
  • a periodic control channel is included in the downlink in the predefined time unit (PTU). TDM is applied between the control channel and data channel(s).
  • multiple user devices in uplink and downlink may be scheduled during one PTU.
  • HARQ-ACK timing and scheduling timing are defined to be a multiple of a predefined time unit PTU length (N x PTU, ⁇ [0, 1, 2, ... ] ).
  • an operation mode which maintains single carrier properties in both UL and DL while maintaining link budget. This applies also in a scenario where eNB's Tx power is » UE's Tx power. When operating in this mode, only one signal at a time is transmitted via one Tx chain/antenna port. This applies to different signals and channels (including e.g. data channels, control channels, reference signals).
  • the predefined time unit defines a maximum periodicity for control channel transmission (in both UL and DL).
  • multiplexing methods between UEs (UE#1 , UE#2) within PTU include TDM and spatial multiplexing (and/or spatial streams, in the form of SU-MIMO and MU-MIMO) (see Figure 6).
  • An allocated resource may contain the entire system bandwidth in frequency (TDM only).
  • TDM/FDM symbol level granularity may be applied in the resource allocation, wherein the allocated resource contains one or more (consecutive) symbols.
  • the usage of FDM (parallel transmission) within PTU is limited to the case with multiple Tx chains (antenna ports), wherein different Tx chains may apply parallel transmission (i.e. FDM) for different UEs and/or DL channels. Both localized FDMA and IFDMA may be applied to facilitate FDMA.
  • Spatial multiplexing is another form of parallel transmission. Spatial multiplexing may utilize a pre-coding operation
  • the pre- coding operation may cover both SU-MIMO and MU-MIMO.
  • multiplexing methods between UEs within PTU include FDM and spatial multiplexing (see Figure 6). Different UEs may be multiplexed within PTU in frequency and/or space (MU-MIMO). Pre-coding and spatial multiplexing within UE may be based on codebooks maintaining the single carrier (or low CM) properties. PRB level granularity may be applied in the resource allocation, wherein an allocated resource contains one or more (consecutive) PRBs.
  • FDM in DL is realized over antenna ports.
  • both MU-MIMO and SU-MIMO are realized such that single carrier properties are met.
  • FDM and TDM are realized within similar sized PTU in both UL and DL.
  • Figure 6 illustrates an exemplary resource allocation for a single user terminal (UE#1 ), covering both control signalling and data signalling.
  • control channel periodicity equals to 1 PTU
  • TDM is applied between control and data parts (in both UL and DL)
  • a variable resource size in DL is achieved by means of varying single carrier symbol allocation, and block based processing is considered.
  • cyclic prefix is included in each block.
  • the minimum allocation unit in time i.e.
  • SC symbol in Figure 6 may also be more than one symbol (one symbol is assumed in Figure 6).
  • the minimum allocation unit in time may or may not include a separate reference signal portion.
  • reference signal portions are not shown in Figure 6.
  • Variable resource size in UL is achieved by means of varying the PRB allocation. In the absence of the data part, the control channel is transmitted via a separate control channel resource (this is shown in UL, TTI(n+2)).
  • the single carrier operation mode is realized on top of DFT-S-OFDMA, and the base station is configured to select between the SC mode and the OFDMA mode (either in a link specific manner, or jointly for both links).
  • the pre-coding covers both SU-MIMO and MU-MIMO, and the resource allocation in frequency may be common for different Tx antennas.
  • FDM single carrier transmission is extended to support multiple simultaneous clusters or combs in the frequency domain
  • the maximum number of frequency domain clusters or combs corresponds to the number of Tx chains or antenna ports.
  • low CM codebooks are applied.
  • low CM codebooks Rel-10, LTE UL SU-MIMO
  • only one layer is transmitted from one antenna port at a time. This is illustrated in Figure 8, and relates to LTE UL SU-MIMO codebook entries available for case of 4 Tx antennas and 3 spatial layers.
  • pre-coding is used herein to refer to beamforming for supporting multi-stream (or multi-layer) transmission in multi-antenna wireless communications.
  • conventional single-stream beamforming the same signal is emitted from each of the transmit antennas with appropriate weighting (phase and gain) such that the signal power is maximized at the receiver output.
  • single-stream beamforming is not able to simultaneously maximize the signal level at each of the receive antennas.
  • multi-stream transmission may be required.
  • the method and the system may be applied in an evolution of LTE/LTE-A (e.g. Rel-13/Rel-14).
  • LTE/LTE-A e.g. Rel-13/Rel-14
  • the method and the system enable maintaining good capacity and coverage performance in different operating environments.
  • the method and the system enable network operators to obtain energy savings, thus increasing profitability and friendliness to the environment.
  • the base station may select a predefined time unit PTU defining a maximum resource allocation unit in time in downlink (block 401 ).
  • the base station may decide on a resource allocation by scheduling one or more terminal devices, such that a scheduling periodicity is one predefined time unit PTU.
  • the base station may cause transmission of a control message to a terminal device, the control message comprising at least one information element indicating the resource allocation scheduled to the terminal device (block 403).
  • the base station may cause transmission of one or more further messages to the terminal device by using a single carrier operation mode (block 404).
  • the one or more further message may comprise a data channel message, control channel message, a reference signal, or a signal or message of any other suitable signal/message type.
  • the base station may select a predefined time unit PTU defining a minimum resource allocation unit in time in uplink, wherein, in block 404, the base station acquires from the terminal device one or more further messages by using the single carrier operation mode.
  • the terminal device may acquire from the base station a control message comprising at least one information element indicating the resource allocation scheduled to the terminal device (block 501 ).
  • the terminal device acquires from the base station one or more further messages by using a single carrier operation mode.
  • the one or more further messages may comprise a data channel message, control channel message, a reference signal, or a signal or message of any other suitable signal/message type.
  • the terminal device causes transmission of the one or more further messages to the base station by using the single carrier operation mode.
  • the embodiments of Figures 4 and 5 may be combined. For example, both criteria may be fulfilled to select one scheme, e.g. the number of connected terminal devices must be below the threshold and the coherence bandwidth below the bandwidth of the operating band in order to select the frequency-selective link adaptation scheme.
  • the processes of Figures 4 and/or 5 may be exclusive to macro base stations, e.g. the base station 102 may carry out the embodiments of Figure 2, 3, 4 and/or 5 but the small cell base station 100 may not (or vice versa).
  • An embodiment provides an apparatus comprising at least one processor and at least one memory including a computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to carry out the procedures of the above-described base station or the network node.
  • the at least one processor, the at least one memory, and the computer program code may thus be considered as an embodiment of means for executing the above- described procedures of the base station or the network node.
  • Figure 9 illustrates a block diagram of a structure of such an apparatus.
  • the apparatus may be comprised in the base station or the network node, e.g. the apparatus may form a chipset or a circuitry in the base station or the network node. In some embodiments, the apparatus is the base station or the network node.
  • the apparatus comprises a processing circuitry 10 comprising the at least one processor.
  • the processing circuitry 10 may comprise a PTU selector 18 configured to select a predefined time unit PTU defining a maximum resource allocation unit in time in downlink.
  • the apparatus may further comprise a scheduler circuitry 14 configured to schedule frequency resource blocks in transmission time intervals to the terminal devices.
  • the scheduler circuitry 14 may output to a control message generator
  • the PTU selector 18 may be configured to output the predefined time unit PTU to the scheduler 14.
  • the scheduler may be configured to schedule one or more terminal devices such that a scheduling periodicity is one predefined time unit PTU.
  • the scheduler may output a signal indicating a scheduled resource allocation to a message generator 12 configured to generate one or more further messages to a terminal device by using a single carrier operation mode.
  • the PTU selector 18 is configured to select a predefined time unit PTU defining a minimum resource allocation unit in time in uplink.
  • the processing circuitry 10 may comprise the circuitries 12 to 18 as sub-circuitries, or they may be considered as computer program modules executed by the same physical processing circuitry.
  • the memory 20 may store one or more computer program products 24 comprising program instructions that specify the operation of the circuitries 12 to 18.
  • the memory 20 may further store a database comprising definitions for the selection of the link adaptation scheme, for example.
  • the apparatus may further comprise a communication interface 22 providing the apparatus with radio communication capability with the terminal devices.
  • the communication interface 22 may comprise a radio communication circuitry enabling wireless communications and comprise a radio frequency signal processing circuitry and a baseband signal processing circuitry.
  • the baseband signal processing circuitry may be configured to carry out the functions of the transmitter and/or the receiver, as described above in connection with Figures 1 to 9.
  • the communication interface may be connected to a remote radio head comprising at least an antenna and, in some embodiments, radio frequency signal processing in a remote location with respect to the base station.
  • the communication interface 22 may carry out only some of radio frequency signal processing or no radio frequency signal processing at all.
  • the connection between the communication interface 22 and the remote radio head may be an analogue connection or a digital connection.
  • An embodiment provides another apparatus comprising at least one processor and at least one memory including a computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to carry out the procedures of the above-described terminal device.
  • the at least one processor, the at least one memory, and the computer program code may thus be considered as an embodiment of means for executing the above-described procedures of the terminal device.
  • Figure 10 illustrates a block diagram of a structure of such an apparatus.
  • the apparatus may be comprised in the terminal device, e.g. it may form a chipset or a circuitry in the terminal device.
  • the apparatus is the terminal device.
  • the apparatus comprises a processing circuitry 50 comprising the at least one processor.
  • the processing circuitry 50 may comprise a communication controller circuitry 54 configured to extract scheduling messages received from a serving base station, to determine communication resources scheduled to the terminal device, e.g.
  • the apparatus may further comprise a message generator 52 configured to transfer one or more further messages to the network node by using a single carrier operation mode.
  • the processing circuitry 50 may comprise the circuitries 52, 54 as sub-circuitries, or they may be considered as computer program modules executed by the same physical processing circuitry.
  • the memory 60 may store one or more computer program products
  • the apparatus may further comprise a communication interface 62 providing the apparatus with radio communication capability with base stations of one or more cellular
  • the communication interface 62 may comprise a radio communication circuitry enabling wireless communications and comprise a radio frequency signal processing circuitry and a baseband signal processing circuitry.
  • the baseband signal processing circuitry may be configured to carry out the functions of the transmitter and/or the receiver, as described above in connection with Figures 2 to 10.
  • circuitry refers to all of the following: (a) hardware- only circuit implementations such as implementations in only analog and/or digital circuitry; (b) combinations of circuits and software and/or firmware, such as (as applicable): (i) a combination of processor(s) or processor cores; or (ii) portions of processor(s)/software including digital signal processor(s), software, and at least one memory that work together to cause an apparatus to perform specific functions; and (c) circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present.
  • circuitry This definition of 'circuitry' applies to all uses of this term in this application. As a further example, as used in this application, the term “circuitry” would also cover an
  • circuitry would also cover, for example and if applicable to the particular element, a baseband integrated circuit, an application-specific integrated circuit (ASIC), and/or a field-programmable grid array (FPGA) circuit for the apparatus according to an embodiment of the invention.
  • ASIC application-specific integrated circuit
  • FPGA field-programmable grid array
  • the processes or methods described above in connection with Figures 2 to 10 may also be carried out in the form of one or more computer process defined by one or more computer programs.
  • the computer program shall be considered to encompass also a module of a computer programs, e.g. the above-described processes may be carried out as a program module of a larger algorithm or a computer process.
  • the computer program(s) may be in source code form, object code form, or in some intermediate form, and it may be stored in a carrier, which may be any entity or device capable of carrying the program.
  • Such carriers include transitory and/or non-transitory computer media, e.g. a record medium, computer memory, read-only memory, electrical carrier signal, telecommunications signal, and software distribution package.
  • the computer program may be executed in a single electronic digital processing unit or it may be distributed amongst a number of processing units.
  • the present invention is applicable to cellular or mobile communication systems defined above but also to other suitable communication systems.
  • the protocols used, the specifications of cellular communication systems, their network elements, and terminal devices develop rapidly. Such development may require extra changes to the described embodiments. Therefore, all words and expressions should be interpreted broadly and they are intended to illustrate, not to restrict, the embodiment. It will be obvious to a person skilled in the art that, as technology advances, the inventive concept can be implemented in various ways.
  • the invention and its embodiments are not limited to the examples described above but may vary within the scope of the claims.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé consistant à sélectionner (201), dans un nœud de réseau, une unité de temps prédéfinie (PTU) définissant une unité d'allocation de ressources maximale dans le temps en liaison descendante. Le nœud de réseau programme (202) un ou plusieurs dispositifs terminaux de sorte qu'une périodicité de programmation soit une unité de temps prédéfinie (PTU). Sur la base de la programmation, le nœud de réseau commande (205) la transmission d'un ou plusieurs messages à un dispositif terminal au moyen d'un seul mode de fonctionnement de porteuse.
PCT/EP2014/068431 2014-08-29 2014-08-29 Modulation de porteuse en communications WO2016029971A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/068431 WO2016029971A1 (fr) 2014-08-29 2014-08-29 Modulation de porteuse en communications

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/068431 WO2016029971A1 (fr) 2014-08-29 2014-08-29 Modulation de porteuse en communications

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WO2016029971A1 true WO2016029971A1 (fr) 2016-03-03

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009008677A2 (fr) * 2007-07-12 2009-01-15 Lg Electronics Inc. Procédé de transmission d'une requête de programmation dans un système de communication sans fil
US20110310777A1 (en) * 2008-12-04 2011-12-22 China Mobile Communications Corporation Method and equipment for user's uplink data scheduling
EP2429243A1 (fr) * 2009-05-05 2012-03-14 Huawei Technologies Co., Ltd. Procédé, système et dispositif de lecture de messages de diffusion
WO2012113131A1 (fr) * 2011-02-21 2012-08-30 Renesas Mobile Corporation Configuration dynamique de liaison montante/descendante pour le duplexage par répartition temporelle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009008677A2 (fr) * 2007-07-12 2009-01-15 Lg Electronics Inc. Procédé de transmission d'une requête de programmation dans un système de communication sans fil
US20110310777A1 (en) * 2008-12-04 2011-12-22 China Mobile Communications Corporation Method and equipment for user's uplink data scheduling
EP2429243A1 (fr) * 2009-05-05 2012-03-14 Huawei Technologies Co., Ltd. Procédé, système et dispositif de lecture de messages de diffusion
WO2012113131A1 (fr) * 2011-02-21 2012-08-30 Renesas Mobile Corporation Configuration dynamique de liaison montante/descendante pour le duplexage par répartition temporelle

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