WO2015131919A1 - Procédé de transmission de données - Google Patents

Procédé de transmission de données Download PDF

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Publication number
WO2015131919A1
WO2015131919A1 PCT/EP2014/054048 EP2014054048W WO2015131919A1 WO 2015131919 A1 WO2015131919 A1 WO 2015131919A1 EP 2014054048 W EP2014054048 W EP 2014054048W WO 2015131919 A1 WO2015131919 A1 WO 2015131919A1
Authority
WO
WIPO (PCT)
Prior art keywords
data packets
user terminals
received
base station
acknowledgement
Prior art date
Application number
PCT/EP2014/054048
Other languages
English (en)
Inventor
Ajith Kumar P R
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/EP2014/054048 priority Critical patent/WO2015131919A1/fr
Publication of WO2015131919A1 publication Critical patent/WO2015131919A1/fr

Links

Classifications

    • 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
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0076—Distributed coding, e.g. network coding, involving channel coding
    • 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
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays

Definitions

  • the exemplary and non-limiting embodiments of the invention relate generally to wireless communication systems .
  • Embodiments of the invention relate especially to apparatuses, methods, and computer program products in communication networks .
  • network planning comprises the use of common base stations (Node B, eNodeB) .
  • UE User eguipment
  • UT user terminal
  • the UEs may communicate directly with each other by applying resources dedicated by the network for a device-to-device (D2D) direct communication or proximity services (ProSe).
  • D2D device-to-device
  • ProSe proximity services
  • the radio path causes impairments to the transmitted signals.
  • multipath propagation causes fast variations in received signal power.
  • Various methods have been developed for mitigating the problems caused by the radio path. For example, applying diversity in reception is a well-known technigue to reduce the fast variations caused by the multipath propagation.
  • receive diversity in the user terminal is difficult to realize because of the volume and cost increase caused by the introduction of a second antenna with enough separation and a second RF chain .
  • an apparatus comprising: at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: communicate with a base station of a communication system; connect via a device-to-device connection to at least one second apparatus; receive transmission of data packets from the base station, the transmission comprising data packets for the apparatus and the at least one second apparatus; transmit to the base station an acknowledgement or negative-acknowledgement regarding each packet depending on whether each packet was received successfully; receive information regarding packets directed to the at least one second apparatus the at least one second apparatus received unsuccessfully; transmit the successfully received data packets directed to the at least one second apparatus the at least one second apparatus received unsuccessfully to the at least one second apparatus using the device-to-device
  • an apparatus comprising: at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: combine data packets of at least two user terminals being in a device-to-device connection with each other, transmit the data packets to the at least two user terminals; receive acknowledgement or negative- acknowledgement regarding each packet from the at least two user terminals; retransmit the data packets none of the at least two user terminals received successfully.
  • a method comprising: communicating with a base station of a communication system; connecting via a device-to-device connection to at least one second apparatus; receiving transmission of data packets from the base station, the transmission comprising data packets for the apparatus and the at least one second apparatus;
  • a method comprising: combining data packets of at least two user terminals being in a device-to-device connection with each other, transmitting the data packets to the at least two user terminals; receiving
  • a computer program embodied on a distribution medium, comprising program instructions which, when loaded into an electronic apparatus, are configured to control the apparatus to execute:
  • acknowledgement or negative-acknowledgement regarding each packet depending on whether each packet was received successfully receiving information regarding packets directed to the at least one second apparatus the at least one second apparatus received unsuccessfully; transmitting the successfully received data packets directed to the at least one second apparatus the at least one second apparatus received unsuccessfully to the at least one second apparatus using the device-to-device connection.
  • a computer program embodied on a distribution medium, comprising program instructions which, when loaded into an electronic apparatus, are configured to control the apparatus to execute: combining data packets of at least two user terminals being in a device-to-device connection with each other, transmitting the data packets to the at least two user terminals;
  • Figure IB illustrates an example of an embodiment
  • FIGS. 2 and 3 are flowcharts illustrating some
  • Embodiments are applicable to any base station, user terminal (UT), user equipment (UT), corresponding
  • UMTS telecommunications system
  • UTRAN radio access network
  • E-UTRAN long term evolution radio access network
  • LTE® long term evolution advanced
  • LTE-A® long term evolution advanced
  • WLAN Wireless Local Area Network
  • WiMAX worldwide interoperability for microwave access
  • Bluetooth® personal communications services
  • PCS personal communications services
  • UWB ultra-wideband
  • IEEE refers to the Institute of Electrical and Electronics Engineers.
  • LTE and LTE-A are developed by the Third Generation Partnership Project 3GPP.
  • LTE Advanced long term evolution advanced
  • LTE-A long term evolution advanced
  • orthogonal frequency multiplexed access OFDMA
  • SC-FDMA single-carrier frequency-division multiple access
  • embodiments may also be applied to other kinds of communications networks having suitable means by adjusting parameters and procedures appropriately.
  • Figure 1A illustrates a simplified view of a communication environment only showing some elements and functional entities, all being logical units whose implementation may differ from what is shown.
  • the connections shown in Figure 1A are logical connections; the actual physical
  • LTE Advanced Long term evolution advanced
  • LTE-A long term evolution advanced
  • Figure 1A shows eNodeBs 100 and 102 connected to core network CN 106 of a communication system.
  • the eNodeBs are connected to each other over an X2 interface.
  • the eNodeBs 100, 102 may host the functions for Radio Resource Management: Radio Bearer Control, Radio Admission Control, Connection Mobility Control, Dynamic Resource Allocation (scheduling) .
  • the counterpart on the CN side can be a serving gateway (S-GW, routing and forwarding user data packets), packet data network gateway (P-GW, for providing connectivity of user devices (UEs) to external packet data networks), and/or mobile management entity (MME), etc.
  • S-GW serving gateway
  • P-GW packet data network gateway
  • MME mobile management entity
  • the MME (not shown) is responsible for the overall user terminal control in mobility, session/call and state management with assistance of the eNodeBs through which the user terminals may connect to the network.
  • the communication system is also able to communicate with other networks, such as a public switched telephone network or the Internet 108.
  • the communication network may also be able to support the usage of cloud services . It should be appreciated that eNodeBs or their
  • the user terminal UT (also called user device, user eguipment, terminal device, etc.) illustrates one type of an apparatus to which resources on the air interface may be allocated and assigned, and thus any feature described herein with a user device may be implemented with a corresponding apparatus, such as a relay node.
  • a relay node is a layer 3 relay ( self-backhauling relay) towards the base station.
  • the user terminal typically refers to a portable computing device that includes wireless mobile communication devices operating with or without a subscriber identification module (SIM), including, but not limited to, the following types of devices: a mobile station (mobile phone), smartphone, personal digital assistant (PDA) , device using a wireless modem (alarm or measurement device, etc.), laptop and/or touch screen computer, tablet, game console, notebook, and multimedia device.
  • SIM subscriber identification module
  • the user terminal (or in some embodiments a layer 3 relay node) is configured to perform one or more of user eguipment functionalities.
  • the device may also be called a subscriber unit, mobile station, remote terminal, access terminal, user eguipment (UE) just to mention but a few names or apparatuses .
  • UE user eguipment
  • the apparatuses have been depicted as single entities, different units, processors and/or memory units (not all shown in Figure 1A) may be implemented.
  • Figure 1A shows two user terminals 110 and 112 which are connected 114, 116 to the eNodeB 100.
  • the terminals are direct device-to-device communication capable terminals.
  • the conventional terminals are direct device-to-device communication capable terminals.
  • Direct communication links may be established among terminal devices.
  • Direct communication link 118 between two devices may be established, e.g., between devices 110 and 112 in Figure 1A.
  • a direct communication link 118 may be based on any radio technology such that the terminal devices or user eguipment 110 and 112 involved in the direct communication may apply communication according to any of a plurality of radio access technologies.
  • the eNodeB 100 may be
  • user terminals capable of device-to- device communication may utilise a novel mode of receive diversity.
  • Figure IB illustrates an example.
  • two UTs 110, 112 in the same cell which are connected via D2D may be chosen by eNodeB 100 for downlink receive diversity.
  • the eNodeB 100 may be configured to combine data for both users and send the data as to a single user.
  • the eNodeN 100 transmits 114, 116 the same data packets to the UTs 110, 112, the data packets comprising the data directed to UT 110 and UT 112.
  • Both UEs receive the same data packets and send ACK or NACK for packets separately to eNodeB.
  • the eNodeB may be configured to retransmit a data packets only if both UTs transmit NACK regarding the data packet.
  • NACKed data packets directed to UT 110 are sent to the UT 110 by UT 112 using D2D 118 if they are ACKed by the UT 112.
  • data packets directed to UT 112 and ACKed by UT 110 but NACKed by UT 112 are exchanged by D2D communication 118.
  • Figure 2 is a flowchart illustrating an embodiment of the invention. The embodiment starts at step 200.
  • the example of Figure 2 illustrates an example of the operation of a device-to-device communication capable user terminal.
  • the user terminal may be UT 110, for example. Not all steps detailed in the example below are mandatory.
  • the user terminal is configured to be in communication with a base station or eNodeB 100.
  • the user terminal may be configured to receive a command from the eNodeB 100 to initiate a device-to-device communication with at least one other user terminal.
  • the other user terminal is UT 112, but in principle there may be more than one user terminal with which a device-to- device communication may be formed.
  • the user terminal may already be in device-to-device
  • the user terminal may initiate the device-to- device communication reguested by the eNodeB.
  • the user terminal may be configured to receive from the eNodeB a command to utilise the device- to-device connection with the at least one other apparatus for transferring data packets successfully received from the base station.
  • the eNodeB may command the user terminal to enter a given downlink receive diversity mode where the user terminals exchange data packets using device-to- device connection.
  • the user terminal is configured to receive transmission of data packets from the eNodeB, the transmission comprising data packets for the user terminal and for the at least one other user terminal.
  • the user terminal is configured to receive data packets directed to the user terminal itself and user terminal 112.
  • the user terminal is configured to transmit to the eNodeB an acknowledgement (ACK) or negative- acknowledgement (NACK) regarding each packet depending on whether each packet was received successfully.
  • ACK acknowledgement
  • NACK negative- acknowledgement
  • ACK/NACK is transmitted regardless to which user terminal the data packet is directed to.
  • the user terminal is configured to receive retransmission of data packets from the eNodeB.
  • the eNodeB is configured to retransmit only those data packets both or all the user terminal received unsuccessfully .
  • the user terminal is configured to receive information regarding packets directed to the at least one other user terminal the at least one other user terminal received unsuccessfully.
  • the user terminal is configured to receive information on the ACKs and NACKS of user terminal 112.
  • the information is received from the other user terminal using device-to-device connection. In an embodiment, the information is received via the eNodeB.
  • the user terminal is configured to transmit the data packets directed to the other user terminal which the user terminal received successfully but the other apparatus received unsuccessfully to the other user terminal using the device-to-device connection.
  • the user terminal is configured to receive from the other user terminal data packets it received unsuccessfully from the eNodeB.
  • the user terminal 110 received in step 212 a number of data packets directed to the user terminal 112 successfully.
  • the user terminal receives information in step 216 of the data packets which the user terminal 112 received
  • the user terminal 110 determines the data packets directed to the user terminal 112 it received successfully but the user terminal 112 unsuccessfully and transmits these data packets to the user terminal 112 using device-to-device connection.
  • step 220 ends in step 220.
  • Figure 3 is a flowchart illustrating an embodiment of the invention. The embodiment starts at step 300.
  • the example of Figure 3 illustrates an example of the operation of an eNodeB connected to device-to-device communication capable user terminals.
  • the user terminals may be UTs 110, 112, for example. Not all steps detailed in the example below are mandatory.
  • the eNodeB is configured to detect that distance between at least two user terminals 110, 112 is shorter than a predetermined distance.
  • the eNodeB is configured to command the at least two user terminals 110,112 to initiate device-to- device communication.
  • the eNodeB may be configured to
  • d(i,j) determines the distance between each pair of UTs, d(i,j) among all active UTs it is serving. If d(i,j) is less than a minimum predetermined distance (which may be a configurable system parameter) the eNodeB may command a device-to-device pairing among all such pair of UTs, irrespective of whether there is any mutual data transfer among the UTs .
  • a minimum predetermined distance which may be a configurable system parameter
  • the eNodeB is configured to command the at least two user terminals in device-to-device communication to utilise the device-to-device connection between the user terminals for transferring data packets successfully received from the base station.
  • the eNodeB is configured to combine data packets of the at least two user terminals 110, 112 being in a device-to-device connection with each other.
  • the eNodeB is configured to transmit the data packets to the at least two user terminals 110, 112.
  • step 312 the eNodeB is configured to receive
  • step 314 the eNodeB is configured to retransmit the data packets none of the at least two user terminals received successfully.
  • step 316 ends in step 316.
  • FIG. 4 illustrates an embodiment.
  • the figure illustrates a simplified example of an apparatus in which embodiments of the invention may be applied.
  • the apparatus may be user equipment, user device or user terminal or a part of it capable communicating with an eNodeB and capable of device-to-device communication
  • the apparatus is depicted herein as an example illustrating some embodiments. It is apparent to a person skilled in the art that the apparatus may also comprise other functions and/or structures and not all described functions and structures are required. Although the apparatus has been depicted as one entity, different modules and memory may be implemented in one or more physical or logical entities.
  • the apparatus of the example includes a control circuitry 400 configured to control at least part of the operation of the apparatus.
  • the control circuitry 400 is configured to execute one or more applications.
  • the apparatus may comprise a memory 402 for storing data or applications. Furthermore the memory may store software 404 executable by the control circuitry 400. The memory may be integrated in the control circuitry.
  • the apparatus comprises at least one transceiver 406.
  • the transceiver is operationally connected to the control circuitry 400. It may be connected to an antenna
  • arrangement 408 comprising one or more antenna elements or antennas .
  • the software 404 may comprise a computer program
  • the apparatus is capable of communicating with an eNodeB and other
  • the apparatus may further comprise user interface 410 operationally connected to the control circuitry 400.
  • the interface may comprise a (touch sensitive) display, a keypad, a microphone, and a speaker, for example.
  • the applications may cause the apparatus at least to communicate with a base station of a
  • Figure 5 illustrates an embodiment.
  • the figure illustrates a simplified example of an apparatus in which embodiments of the invention may be applied.
  • the apparatus may be a base station or an eNodeB or a part of it capable communicating with and controlling user terminals .
  • the apparatus is depicted herein as an example illustrating some embodiments. It is apparent to a person skilled in the art that the apparatus may also comprise other functions and/or structures and not all described functions and structures are reguired. Although the apparatus has been depicted as one entity, different modules and memory may be implemented in one or more physical or logical entities.
  • the apparatus of the example includes a control circuitry 500 configured to control at least part of the operation of the apparatus.
  • the control circuitry 500 is configured to execute one or more applications.
  • the apparatus may comprise a memory 502 for storing data or applications. Furthermore the memory may store software 504 executable by the control circuitry 600. The memory may be integrated in the control circuitry.
  • the apparatus comprises at least one transceiver 506.
  • the transceiver is operationally connected to the control circuitry 500. It may be connected to an antenna
  • arrangement 508 comprising one or more antenna elements or antennas .
  • the software 504 may comprise a computer program
  • the apparatus is capable of communicating with user terminals.
  • the apparatus may further comprise an interface 510 operationally connected to the control circuitry 500.
  • the interface may enable the apparatus to communicate with network elements such as other eNodeBs and core network.
  • the applications may cause the apparatus at least to combine data packets of at least two user terminals being in a device-to-device connection with each other, transmit the data packets to the at least two user terminals; receive acknowledgement or negative- acknowledgement regarding each packet from the at least two user terminals; retransmit the data packets none of the at least two user terminals received successfully.
  • the steps and related functions described in the above and attached figures are in no absolute chronological order, and some of the steps may be performed simultaneously or in an order differing from the given one. Other functions can also be executed between the steps or within the steps . Some of the steps can also be left out or replaced with a corresponding step.
  • the apparatuses or controllers able to perform the above- described steps may be implemented as an electronic digital computer, or a circuitry which may comprise a working memory (RAM), a central processing unit (CPU), and a system clock.
  • the CPU may comprise a set of registers, an arithmetic logic unit, and a controller.
  • the controller or the circuitry is controlled by a seguence of program instructions transferred to the CPU from the RAM.
  • the controller may contain a number of microinstructions for basic operations .
  • the implementation of microinstructions may vary depending on the CPU design.
  • the program instructions may be coded by a programming language, which may be a high-level programming language, such as C, Java, etc., or a low-level programming language, such as a machine language, or an assembler.
  • the electronic digital computer may also have an operating system, which may provide system services to a computer program written with the program instructions.
  • circuitry refers to all of the following: (a) hardware-only circuit implementations, such as implementations in only analog and/or digital circuitry, and (b) combinations of circuits and software (and/or firmware), such as (as applicable) : (i) a combination of processor (s) or (ii) portions of processor ( s ) /software including digital signal processor ( s ) , software, and memory (ies) that work together to cause an apparatus to perform various functions, and (c) circuits, such as a microprocessor ( s ) or a portion of a microprocessor ( s ) , that reguire software or firmware for operation, even if the software or firmware is not physically present.
  • circuitry' applies to all uses of this term in this application.
  • the term 'circuitry' would also cover an implementation of merely a processor (or multiple processors) or a portion of a processor and its (or their) accompanying software and/or firmware.
  • the term 'circuitry' would also cover, for example and if applicable to the particular element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in a server, a cellular network device, or another network device .
  • An embodiment provides a computer program embodied on a distribution medium, comprising program instructions which, when loaded into an electronic apparatus, are configured to control the apparatus to execute the embodiments described above.
  • the computer program may be in source code form, object code form, or in some intermediate form, and it may be stored in some sort of carrier, which may be any entity or device capable of carrying the program.
  • carrier include a record medium, computer memory, read-only memory, and a software distribution package, for example.
  • the computer program may be executed in a single electronic digital computer or it may be distributed amongst a number of computers .
  • the apparatus may also be implemented as one or more integrated circuits, such as application-specific integrated circuits ASIC.
  • Other hardware embodiments are also feasible, such as a circuit built of separate logic components.
  • a hybrid of these different implementations is also feasible.
  • An embodiment provides an apparatus, comprising: means for communicating with a base station of a communication system; means for connecting via a device- to-device connection to at least one second apparatus; means for receiving transmission of data packets from the base station, the transmission comprising data packets for the apparatus and the at least one second apparatus; means for transmitting to the base station an acknowledgement or negative-acknowledgement regarding each packet depending on whether each packet was received successfully; means for receiving information regarding packets directed to the at least one second apparatus the at least one second apparatus received unsuccessfully; and means for transmitting the successfully received data packets directed to the at least one second apparatus the at least one second apparatus received unsuccessfully to the at least one second apparatus using the device-to-device connection .
  • An embodiment provides an apparatus, comprising: means for combining data packets of at least two user terminals being in a device-to-device connection with each other, means for transmitting the data packets to the at least two user terminals; means for receiving acknowledgement or negative-acknowledgement regarding each packet from the at least two user terminals and means for retransmitting the data packets none of the at least two user terminals received successfully.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

L'invention concerne des appareils et des procédés pour la communication de données. La solution consiste à : communiquer (202) avec une station de base d'un système de communication ; se connecter (206) à un second dispositif via une connexion de dispositif à dispositif ; recevoir (210) des paquets de données transmis depuis la station de base, la transmission comprenant des paquets de données destinés à l'appareil et au second appareil ; transmettre (212) à la station de base un ACK ou un NACK pour chaque paquet selon que chaque paquet a été reçu avec succès ou non ; recevoir (216) des informations concernant des paquets destinés au second appareil, que le second appareil n'a pas réussi à recevoir ; et transmettre (218) au second appareil les paquets de données reçus avec succès, destinés au second appareil, que le second appareil n'a pas réussi à recevoir, au moyen de la connexion D2D.
PCT/EP2014/054048 2014-03-03 2014-03-03 Procédé de transmission de données WO2015131919A1 (fr)

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Application Number Priority Date Filing Date Title
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Citations (3)

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Publication number Priority date Publication date Assignee Title
US20090262678A1 (en) * 2008-04-22 2009-10-22 Ozgur Oyman Cooperative communications techniques
US20100329227A1 (en) * 2008-03-14 2010-12-30 Koninklijke Philips Electronics N.V. Robust coding in multi-hop networks
US20130089020A1 (en) * 2010-06-17 2013-04-11 Nokia Corporation Local selection of retransmitting device in cooperative cluster to enhance cellular multicast

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US20100329227A1 (en) * 2008-03-14 2010-12-30 Koninklijke Philips Electronics N.V. Robust coding in multi-hop networks
US20090262678A1 (en) * 2008-04-22 2009-10-22 Ozgur Oyman Cooperative communications techniques
US20130089020A1 (en) * 2010-06-17 2013-04-11 Nokia Corporation Local selection of retransmitting device in cooperative cluster to enhance cellular multicast

Non-Patent Citations (1)

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Title
KATTI S ET AL: "XORs in The Air: Practical Wireless Network Coding", 11 September 2006 (2006-09-11), pages 1 - 12, XP002493001, Retrieved from the Internet <URL:http://piper.csail.mit.edu/papers/copesc.pdf> *

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