WO2013008167A1 - Ordonnancement de paquets dans un réseau de télécommunication cellulaire en vue de l'établissement de télécommunications de dispositif à dispositif - Google Patents

Ordonnancement de paquets dans un réseau de télécommunication cellulaire en vue de l'établissement de télécommunications de dispositif à dispositif Download PDF

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Publication number
WO2013008167A1
WO2013008167A1 PCT/IB2012/053492 IB2012053492W WO2013008167A1 WO 2013008167 A1 WO2013008167 A1 WO 2013008167A1 IB 2012053492 W IB2012053492 W IB 2012053492W WO 2013008167 A1 WO2013008167 A1 WO 2013008167A1
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WO
WIPO (PCT)
Prior art keywords
mobile terminal
type
scheduling
sinr
activity factor
Prior art date
Application number
PCT/IB2012/053492
Other languages
English (en)
Inventor
Tao Chen
Esa Kunnari
Original Assignee
Renesas Mobile Corporation
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
Priority claimed from GB1111854.4A external-priority patent/GB2493131B/en
Priority claimed from US13/180,033 external-priority patent/US8675580B2/en
Application filed by Renesas Mobile Corporation filed Critical Renesas Mobile Corporation
Priority to CN201280034274.1A priority Critical patent/CN103688587A/zh
Priority to DE112012002945.3T priority patent/DE112012002945T5/de
Publication of WO2013008167A1 publication Critical patent/WO2013008167A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • Embodiments of the present invention relate generally to communications technology and, more particularly, to methods and apparatus for facilitating packet scheduling in a hybrid network which comprises device-to-device (D2D) and other communications such as cellular communications.
  • D2D device-to-device
  • cellular communications such as cellular communications.
  • LTE Long Term Evolution
  • LTE-Advanced specifications not only provide for cellular communications as between a mobile terminal and a base station, but also, for communications between mobile terminals.
  • D2D device-to-device or "D2D” communications
  • mobile terminals may communicate with one another utilizing a direct radio link in addition to utilizing cellular communication links.
  • the cellular communications utilize frequency division duplexing (FDD) mode
  • these D2D communications utilize time division duplexing (TDD) duplex mode, with the base station controlling the use of the uplink (UL) and downlink (DL) resources of the cellular network.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • D2D communications are reduced transmitter power consumption for both the base station and the mobile terminals, increased cellular network capacity and improved services for the users, and thus, D2D communications are expected to become very popular as the demands on wireless communications networks increase faster than does the capacity of these networks.
  • PF transmission time interval
  • PF scheduler While providing a fair comparison for all cellular devices, use of techniques such as the PF scheduler to divide and schedule resources in such a hybrid network poses several difficulties. Because of dynamic channel conditions in D2D connections and associated levels of interference, mobile terminals in a D2D connection will have a higher PF metric. In this regard, the PF metric distribution for mobile terminals with a D2D connection may be much wider because of more dynamic changes in the channel conditions and the interference, mainly from the cellular users. As a mobile terminal with a D2D connection may experience severe interference from the neighboring cellular and D2D transmissions at some TTIs, the average SINR decreases greatly.
  • the PF metric will generally be fairly high in comparison with cellular users.
  • utilizing the PF metric in hybrid network will usually result in choosing the D2D users over cellular users, and thus, packets from D2D mobile terminals may be overscheduled.
  • Methods, apparatus and computer program products are provided according to an example embodiment for facilitating scheduling of packets in a hybrid cellular and non- cellular environment.
  • the various example embodiments perform PF scheduling in a manner that more uniformly considers the division and scheduling of resources for both cellular and D2D devices such that packets from D2D mobile terminals are not overscheduled relative to cellular or other mobile terminals.
  • a method for use in controlling packet scheduling in a hybrid communication network comprising at least one first type of mobile terminal and at least one second type of mobile terminal, wherein the first type of mobile terminal is a device-to-device (D2D) mobile terminal and the second type of mobile terminal is different to said first type of mobile terminal, the method comprising: calculating a scheduling activity factor based at least in part on a total number of said first and second types of mobile terminals;
  • D2D device-to-device
  • SINR signal to interference plus noise ratio
  • the embodiment is particularly well suited to arrangements in which the second type of mobile terminal is a cellular terminal.
  • the method may further comprise generating a
  • D2D SINR distribution based at least in part on previous D2D SINR measurements within a particular time window, maintaining a channel quality indicator (CQI) for the mobile terminal of the first type separate from the or each mobile terminal of the second type, and causing the scheduling activity factor to be communicated, such as from a base station, to the mobile terminal of the first type by a signaling protocol, such as (without limitation) cellular signaling or a device-to-device connection.
  • the scheduling of resources for use by the mobile terminal of the first type and the or each mobile terminal of the second terminal may have the effect of granting resources for transmission of data, this being notified to said mobile terminals via the scheduling information.
  • a method for use in controlling packet scheduling in a hybrid communication network comprising at least one first type of mobile terminal and at least one second type of mobile terminal, wherein the first type of mobile terminal is a device-to-device (D2D) mobile terminal and the second type of mobile terminal is different than said first type of mobile terminal, the method comprising: receiving a scheduling activity factor, the scheduling activity factor being based at least in part on a total number of mobile devices of the first type and second type of mobile terminals;
  • D2D device-to-device
  • SINR threshold signal to interference plus noise ratio
  • the SINR distribution which may comprise a SINR distribution curve is based at least in part on SINR measurement over a particular window of time.
  • an apparatus for use in controlling packet scheduling in a hybrid communication network comprising at least one first type of mobile terminal and at least one second type of mobile terminal, wherein the first type of mobile terminal is a device-to-device (D2D) mobile terminal and the second type of mobile terminal is different to said first type of mobile terminal
  • the apparatus comprising a processing system, which may, for example, be embodied as processing circuitry in the form of at least one memory and computer program code.
  • the processing system is configured to:
  • SINR signal to interference plus noise ratio
  • the apparatus may comprise a network node such as a base station.
  • apparatus for use in controlling packet scheduling in a hybrid communication network, the hybrid network comprising at least one first type of mobile terminal and at least one second type of mobile terminal, wherein the first type of mobile terminal is a device-to-device (D2D) mobile terminal and the second type of mobile terminal is different than said first type of mobile terminal
  • the apparatus comprising a processing system, which may, for example, be embodied as processing circuitry in the form of at least one memory and computer program code.
  • the processing system is configured to:
  • the scheduling activity factor being based at least in part on a total number of mobile devices of the first type and second type of mobile terminals
  • SINR threshold signal to interference plus noise ratio
  • the apparatus may comprise a mobile terminal.
  • Yet further example embodiments include computer readable medium comprising a set of instructions, which, when executed by a suitable computing device, cause the computing device to perform the methods set out above.
  • Figure 1 illustrates a system including mobile terminals and a base station configured to support communications in accordance with one embodiment of the present invention.
  • FIG. 2 is a block diagram of a mobile terminal in accordance with one embodiment of the present invention, wherein the mobile terminal may comprise a mobile terminal of a first type, such as a D2D terminal, or a terminal of a second type, such as a cellular terminal.
  • a first type such as a D2D terminal
  • a second type such as a cellular terminal
  • FIG. 3 is a block diagram of a base station or other network element in accordance with one embodiment of the present invention.
  • Figure 4 is a signaling diagram illustrating messages exchanged between the base station, a terminal of the first type, and a mobile terminal of the second type in accordance with an example embodiment of the present invention.
  • Figure 5 is a flow chart illustrating the operations performed from the perspective of a base station in accordance with one embodiment of the current invention.
  • Figure 6 is a flow chart illustrating the operations performed from the perspective of a base station in accordance with one embodiment of the current invention.
  • Figure 7 is a flow chart illustrating the operations performed from the perspective of a terminal of the first type in accordance with one embodiment of the current invention.
  • circuitry refers to all of the following: (a)hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry) and (b) to combinations of circuits and software (and/or firmware), such as (as applicable): (i) to a combination of processor(s) or (ii) to portions of processor(s)/software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) to 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 would also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its (or their) accompanying software and/or firmware.
  • circuitry would also cover, for example and if applicable to the particular claim element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in server, a cellular network device, or other network device.
  • a method, apparatus and computer program product are disclosed for facilitating scheduling in a hybrid communication network.
  • the method, apparatus and computer program product of some example embodiments perform PF scheduling in a manner that more uniformly considers the division and scheduling of resources for both cellular and D2D devices (these being example devices of the second and first type referred to herein, respectively) such that packets from D2D mobile terminals are not overscheduled relative to cellular or other mobile terminals.
  • Figure 1 which includes communication devices (e.g., mobile terminals 14 and 16) that are capable of communication with a network 10 (e.g., a core network) via a base station 18 (e.g., a Node B, an evolved Node B (eNB) or another type of access point).
  • a network 10 e.g., a core network
  • a base station 18 e.g., a Node B, an evolved Node B (eNB) or another type of access point.
  • eNB evolved Node B
  • While the network 10 may be configured in accordance with LTE or LTE-Advanced (LTE-A), other networks may support the method, apparatus and computer program product of embodiments of the present invention including those configured in accordance with wideband code division multiple access (W-CDMA), CDMA2000, global system for mobile communications (GSM), general packet radio service (GPRS) and/or the like.
  • W-CDMA wideband code division multiple access
  • CDMA2000 CDMA2000
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • the network 10 may include a collection of various different nodes, devices or functions that may be in communication with each other via corresponding wired and/or wireless interfaces.
  • the network 10 may include one or more base stations 18, each of which may serve a coverage area divided into one or more cells.
  • the base stations could be, for example, part of one or more cellular or mobile networks or public land mobile networks (PLMNs).
  • PLMNs public land mobile networks
  • processing devices e.g., personal computers, server computers or the like
  • a communication device such as the mobile terminals 14 and 16 (also known as user equipment (UE)), may be in communication with other communication devices or other devices via the base station 18 and, in turn, the network 10.
  • the mobile terminals 14 or 16 may comprise any device, but for purposes of illustration, mobile terminals 14 represent so-called mobile terminals of a first type that are configured to communicate via a D2D connection, while mobile terminal 16 represents a so-called mobile terminal of the second type that communicates via a connection other than a D2D connection, such as, for example, a cellular mobile terminal.
  • the mobile terminals 14 and 16 include an antenna for transmitting signals to and for receiving signals from the base station 18.
  • mobile terminals 14 or 16 may be a mobile communication device such as, for example, a mobile telephone, portable digital assistant (PDA), pager, laptop computer, or any of numerous other hand held or portable communication devices, computation devices, content generation devices, content consumption devices, or combinations thereof.
  • the mobile terminals 14 and 16 may include one or more processors that may define processing circuitry either alone or in combination with one or more memories.
  • the processing circuitry may utilize instructions stored in the memory to cause the mobile terminal to operate in a particular way or execute specific functionality when the instructions are executed by the one or more processors.
  • the mobile terminals 14 and 16 may also include communication circuitry and corresponding hardware/software to enable communication with other devices and/or the network 10. While only two D2D terminals 14 and a single other, e.g., cellular, terminal 16 are illustrated in Figure 1 , more mobile terminals may be included within network 10 and/or having a communication link with base station 18.
  • the mobile terminals 14 or 16 may be embodied as or otherwise include an apparatus 20 as generically represented by the block diagram of Figure 2. While the apparatus may be employed, for example, by a mobile terminal, it should be noted that the components, devices or elements described below may not be mandatory and thus some may be omitted in certain embodiments. Additionally, some embodiments may include further or different components, devices or elements beyond those shown and described herein.
  • the apparatus 20 may include or otherwise be in communication with processing circuitry 22 that is configurable to perform actions in accordance with example embodiments described herein.
  • the processing circuitry may be configured to perform data processing, application execution and/or other processing and management services according to an example embodiment of the present invention.
  • the apparatus or the processing circuitry may be embodied as a chip or chip set.
  • the apparatus or the processing circuitry may comprise one or more physical packages (e.g., chips) including materials, components and/or wires on a structural assembly (e.g., a baseboard).
  • the structural assembly may provide physical strength, conservation of size, and/or limitation of electrical interaction for component circuitry included thereon.
  • the apparatus or the processing circuitry may therefore, in some cases, be configured to implement an embodiment of the present invention on a single chip or as a single "system on a chip.”
  • a chip or chipset may constitute means for performing one or more operations for providing the functionalities described herein.
  • the processing circuitry 22 may include a processor 24 and memory 26 that may be in communication with or otherwise control a device interface 28 and, in some cases, a user interface.
  • the processing circuitry may be embodied as a circuit chip (e.g., an integrated circuit chip) configured (e.g., with hardware, software or a combination of hardware and software) to perform operations described herein.
  • the processing circuitry may be embodied as a portion of a mobile computing device or other mobile terminal, and may provide for D2D communications in the context of a D2D terminal.
  • the device interface 28 may include one or more interface mechanisms for enabling communication with other devices and/or networks.
  • the device interface may be any means such as a device or circuitry embodied in either hardware, or a combination of hardware and software that is configured to receive and/or transmit data from to a network 10 and/or any other device or module in communication with the processing circuitry 22.
  • the device interface may include, for example, an antenna (or multiple antennas) and supporting hardware and/or software for enabling communications with a wireless communication network and/or a communication modem or other hardware/software for supporting communication via cable, digital subscriber line (DSL), universal serial bus (USB), Ethernet or other methods.
  • DSL digital subscriber line
  • USB universal serial bus
  • the memory 26 may include one or more non- transitory memory devices such as, for example, volatile and/or non-volatile memory that may be either fixed or removable.
  • the memory may be configured to store information, data, applications, instructions or the like for enabling the apparatus 20 to carry out various functions in accordance with example embodiments of the present invention.
  • the memory could be configured to buffer input data for processing by the processor 24.
  • the memory could be configured to store instructions for execution by the processor.
  • the memory may include one of a plurality of databases that may store a variety of files, contents or data sets. Among the contents of the memory, applications may be stored for execution by the processor in order to carry out the functionality associated with each respective application.
  • the memory may be in communication with the processor via a bus for passing information among components of the apparatus.
  • the processor 24 may be embodied in a number of different ways.
  • the processor may be embodied as various processing means such as one or more of a microprocessor or other processing element, a coprocessor, a controller or various other computing or processing devices including integrated circuits such as, for example, an ASIC (application specific integrated circuit), an FPGA (field programmable gate array), or the like.
  • the processor may be configured to execute instructions stored in the memory 26 or otherwise accessible to the processor.
  • the processor may represent an entity (e.g., physically embodied in circuitry - in the form of processing circuitry 22) capable of performing operations according to embodiments of the present invention while configured accordingly.
  • the processor when the processor is embodied as an ASIC, FPGA or the like, the processor may be specifically configured hardware for conducting the operations described herein.
  • the processor when the processor is embodied as an executor of software instructions, the instructions may specifically configure the processor to perform the operations described herein.
  • the apparatus 20 may comprise, in the case of mobile terminal 14, a D2D mobile terminal that is configured to communicate in accordance via a D2D connection.
  • Apparatus 20 may also comprise, in the case of mobile terminal 16, a mobile terminal configured to communicate other than by D2D connections and, as such may be a cellular mobile terminal including, without limitation, a Smartphone.
  • mobile terminal 16 may, in other example embodiments, be a hybrid terminal that is configured to communicate in accordance with both a D2D connection and another connection, such as a cellular connection.
  • a base station 18 may be configured to communicate with the mobile terminals 14, 16.
  • the base station 18 may include an antenna or an array of antennas for transmitting signals to and for receiving signals from the mobile terminals.
  • the base station 18 may include one or more processors that may define processing circuitry either alone or in combination with one or more memories.
  • the processing circuitry may utilize instructions stored in the memory to cause the base station to operate in a particular way or execute specific functionality when the instructions are executed by the one or more processors.
  • the base station 18 may also include communication circuitry and corresponding hardware/software to enable communication with the mobile terminals and/or the network 12.
  • the base station may be embodied as or otherwise include an apparatus 30 as generically represented by the block diagram of Figure 3. While the apparatus may be employed, for example, by a base station, it should be noted that the components, devices or elements described below may not be mandatory and thus some may be omitted in certain embodiments. Additionally, some embodiments may include further or different components, devices or elements beyond those shown and described herein.
  • the apparatus 30 may include or otherwise be in communication with processing circuitry 32 that is configurable to perform actions in accordance with example embodiments described herein.
  • the processing circuitry may be configured to perform data processing, application execution and/or other processing and management services according to an example embodiment of the present invention.
  • the apparatus or the processing circuitry may be embodied as a chip or chip set.
  • the apparatus or the processing circuitry may comprise one or more physical packages (e.g., chips) including materials, components and/or wires on a structural assembly (e.g., a baseboard).
  • the structural assembly may provide physical strength, conservation of size, and/or limitation of electrical interaction for component circuitry included thereon.
  • the apparatus or the processing circuitry may therefore, in some cases, be configured to implement an embodiment of the present invention on a single chip or as a single "system on a chip.”
  • a chip or chipset may constitute means for performing one or more operations for providing the functionalities described herein.
  • the processing circuitry 32 may include a processor
  • the processing circuitry may be embodied as a circuit chip (e.g., an integrated circuit chip) configured (e.g., with hardware, software or a combination of hardware and software) to perform operations described herein.
  • the processing circuitry may be embodied as a portion of a base station or other network entity.
  • the device interface 38 may include one or more interface mechanisms for enabling communication with other devices and/or networks.
  • the device interface may be any means such as a device or circuitry embodied in either hardware, or a combination of hardware and software that is configured to receive and/or transmit data from/to a network 12 and/or any other device or module in communication with the processing circuitry 32.
  • the device interface may include, for example, an antenna (or multiple antennas) and supporting hardware and/or software for enabling communications with a wireless communication network and/or a communication modem or other hardware/software for supporting communication via cable, digital subscriber line (DSL), universal serial bus (USB), Ethernet or other methods.
  • DSL digital subscriber line
  • USB universal serial bus
  • the device interface includes a cellular modem 40 for supporting communications in the licensed spectrum, such as communications with the base station 18, and a non-cellular modem 42 for supporting communications in the license exempt band, such as non-cellular communications, e.g., communications in the ISM band or the TVWS band, with other terminals.
  • a cellular modem 40 for supporting communications in the licensed spectrum, such as communications with the base station 18, and a non-cellular modem 42 for supporting communications in the license exempt band, such as non-cellular communications, e.g., communications in the ISM band or the TVWS band, with other terminals.
  • the memory 36 may include one or more non- transitory memory devices such as, for example, volatile and/or non-volatile memory that may be either fixed or removable.
  • the memory may be configured to store information, data, applications, instructions or the like for enabling the apparatus 30 to carry out various functions in accordance with example embodiments of the present invention.
  • the memory could be configured to buffer input data for processing by the processor 34.
  • the memory could be configured to store instructions for execution by the processor.
  • the memory may include one of a plurality of databases that may store a variety of files, contents or data sets. Among the contents of the memory, applications may be stored for execution by the processor in order to carry out the functionality associated with each respective application.
  • the memory may be in communication with the processor via a bus for passing information among components of the apparatus.
  • the processor 34 may be embodied in a number of different ways.
  • the processor may be embodied as various processing means such as one or more of a microprocessor or other processing element, a coprocessor, a controller or various other computing or processing devices including integrated circuits such as, for example, an ASIC (application specific integrated circuit), an FPGA (field programmable gate array), or the like.
  • the processor may be configured to execute instructions stored in the memory 36 or otherwise accessible to the processor.
  • the processor may represent an entity (e.g., physically embodied in circuitry - in the form of processing circuitry 32) capable of performing operations according to embodiments of the present invention while configured accordingly.
  • the processor when the processor is embodied as an ASIC, FPGA or the like, the processor may be specifically configured hardware for conducting the operations described herein.
  • the processor when the processor is embodied as an executor of software instructions, the instructions may specifically configure the processor to perform the operations described herein.
  • Figure 4 is a signaling diagram illustrating messages exchanged between the base station 18, D2D terminal 14, and other mobile terminal 16 in accordance with an example embodiment of the present invention. While Figure 4 illustrates the messages being exchanged between a base station 18, D2D terminal 14, and other mobile terminal 16, these messages are shown for example purposes only. Thus, any device within a communications network 10 may be utilized in place of the base station 18, D2D terminal 14, and other mobile terminal 16, including but not limited to any type of device.
  • the other mobile terminal 16 may comprise any type of device that is communicating with the base station 18 via a connection other than a D2D connection, such as a cellular connection.
  • the other terminal 16 may be a hybrid terminal that is also capable of D2D communications, but is considered an other terminal in an instance in which the other terminal is relying on a connection, other than a D2D connection, to communicate with the base station 18 and, in turn, with the network 10.
  • the D2D mobile terminal 14 and other mobile terminal 16 may send a message, for example in the form of an availability response, to the base station 18, to enable the base station 18 to determine the number of D2D mobile terminals 14 and other terminals 16 connected to the base station 18.
  • the message comprises an availability response, it may be sent by way of a response to a ping or request from the base station 18. It is to be noted that an availability response may not be requested or triggered by the base station 18 and the D2D terminals and the other terminals may not be required to send an availability response to the base station 18 if the base station 18 has another mechanism for determining the number of D2D mobile terminals 14 and other terminals 16 which are connected to the base station 18.
  • a connection to the base station 18 may comprise any type of communication connection, either wired or wireless, and may exist in a cellular or non-cellular band.
  • the base station 18 calculates a scheduling activity factor.
  • This factor may be derived from a mathematical equation or formula which has the effect of placing a limit on, or reducing, the SINR value reported by the D2D mobile terminal 14.
  • CDF SINR Cumulative Distribution Function
  • the base station sends the scheduling activity factor to the D2D mobile terminal 14.
  • This transmission from the base station 18 may occur over any communication protocol, including without limitation, via a signaling protocol such as cellular signaling or GPS signaling.
  • a SINR distribution which may be in the form of a curve, is received or generated either by the base station 18, by the D2D mobile terminal 14, by the other mobile terminal 16, or by an extemal device.
  • This SINR distribution curve is stored in a memory which is accessible to the base station 18, the D2D mobile terminal 14, or the other mobile terminal 16, and can be stored in any type of programming language or sequence of commands.
  • the SINR distribution curve may be generated by analyzing historical SINR information for the D2D mobile terminal 14, and the SINR can be sampled every TTI. The samples within a period can be stored in order to shape the SINR distribution curve, which can be updated based on a time sliding window period, and can include the latest samples and remove the obsolete samples.
  • FIG. 5 An example of a SINR distribution curve is provided in Figure 5, where the horizontal axis depicts D2D SINR values, and the vertical axis depicts the calculated scheduling activity factor for a certain window of time.
  • the SINR distribution curve shows a 13 dB SINR value for a D2D mobile terminal with a 32% scheduling activity factor.
  • the D2D mobile device 14 uses the SINR value from the SINR distribution curve as a threshold SINR value. Then, when the D2D device calculates a measured SINR value, the D2D mobile device 14 compares the measured SINR value to the threshold SINR value. Thereafter the D2D device may only report the SINR value to the base station for scheduling considerations if the measured SINR value exceeds the threshold SINR value.
  • the scheduling considerations may comprise calculations utilizing any packet scheduling calculation, including the PF scheduling metric.
  • FIG. 6 and 7 flowcharts illustrating the operations performed by a method, apparatus and computer program product, such as apparatus 20 of Figure 2 and apparatus 30 of Figure 3, in accordance with one embodiment of the present invention are illustrated.
  • each block of the flowchart, and combinations of blocks in the flowchart may be implemented by various means, such as hardware, firmware, processor, circuitry and/or other device associated with execution of software including one or more computer program instructions.
  • one or more of the procedures described above may be embodied by computer program instructions.
  • the computer program instructions which embody the procedures described above may be stored by a memory device of an apparatus employing an embodiment of the present invention and executed by a processor in the apparatus.
  • any such computer program instructions may be loaded onto a computer or other programmable apparatus (e.g., hardware) to produce a machine, such that the resulting computer or other programmable apparatus provides for implementation of the functions specified in the flowchart block(s).
  • These computer program instructions may also be stored in a non-transitory computer-readable storage memory that may direct a computer or other programmable apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage memory produce an article of manufacture, the execution of which implements the function specified in the flowchart block(s).
  • the computer program instructions may also be loaded onto a computer or other programmable apparatus to cause a series of operations to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide operations for implementing the functions specified in the flowchart block(s).
  • the operations of Figures 6 and 7, when executed, convert a computer or processing circuitry into a particular machine configured to perform an example embodiment of the present invention.
  • the operations of each of Figures 6 and 7 define an algorithm for configuring a computer or processing circuitry, e.g., processor 34 in regards to the operations of Figure 6 and processor 24 in regards to the operations of Figure 7, to perform an example embodiment.
  • a general purpose computer may be provided with an instance of the processor which performs the algorithm of a respective one of Figures 6 and 7 to transform the general purpose computer into a particular machine configured to perform an example embodiment.
  • blocks of the flowchart support combinations of means for performing the specified functions and combinations of operations for performing the specified functions. It will also be understood that one or more blocks of the flowchart, and combinations of blocks in the flowchart, can be implemented by special purpose hardware -based computer systems which perform the specified functions, or combinations of special purpose hardware and computer instructions.
  • Figure 6 is a flow chart illustrating the operations performed from the perspective of a base station in accordance with one embodiment of the current invention.
  • the base station 18 and, more generally, apparatus 30 calculates the scheduling activity factor based at least in part on a total number of both D2D mobile terminals and other mobile terminals (block 60).
  • the scheduling activity factor may be calculated by dividing the number of D2D mobile terminals by the total number of D2D mobile terminals and other mobile terminals, then multiplying the result by 100% to obtain the percentage which comprises the scheduling activity factor.
  • the apparatus 30 sends the scheduling activity factor to at least one D2D mobile terminal or a plurality of D2D mobile terminals (block 62).
  • the apparatus 30 may receive SINR information from the at least one D2D mobile terminal or the plurality of mobile terminals (block 64). This communication of the SINR information may occur after the D2D mobile terminal 14 references the SINR distribution curve to determine the SINR threshold level which corresponds to the scheduling activity factor. Thus, the D2D mobile terminal 14 only reports SINR information to the base station 18 if the measured SINR exceeds the derived threshold SINR level.
  • the base station 18 may also take into account other measures of the quality of the respective communication channels in addition to the SINR in the scheduling of resources for the first (D2D) and second types of mobile terminals.
  • the scheduling of resources may also involve the base station 18 maintaining a channel quality indicator (CQI) for the mobile terminals 14 of the first type separate from the mobile terminals 16 of the second type.
  • CQI may comprise any information which describes the quality of a communication channel, or any information which relates to the characteristics of a communication channel.
  • the CQI may be based upon any one or more of various performance metrics including, for example, the SINR.
  • the first and second types of mobile terminals may report the CQI to the base station which may, in turn, take the CQI for the first and second types of mobile terminals into account along with the SINR information in scheduling resources for use by the various types of terminals.
  • the apparatus 30 may calculate packet scheduling for the D2D mobile terminal and the other mobile terminals utilizing a scheduling metric, such as the PF scheduling metric (block 66).
  • This scheduling metric may comprise any type of packet scheduling metric, including without limitation, the PF scheduling metric.
  • the base station 18 computes packet scheduling for the at least one D2D mobile terminal or plurality of D2D mobile terminals separately from the other mobile terminals. The computed packet scheduling information is thereafter sent to at least the or each D2D mobile terminals, for use in subsequent communications of data therefrom.
  • Figure 7 is a flow chart illustrating the operations performed from the perspective of a D2D mobile terminal 14 in accordance with one embodiment of the current invention.
  • the D2D mobile terminal 14 and, more generally, the apparatus 20 receives a D2D scheduling activity factor based at least in part on a total number of D2D mobile terminals and other terminals (block 70).
  • the scheduling activity factor may be communicated from the base station 18 to the D2D mobile terminal 14 via any signaling protocol, including without limitation, cellular signaling or GPS signaling.
  • the D2D mobile terminal 14 determines a threshold SINR value based at least in part on the D2D scheduling activity factor by referencing a SINR distribution curve (block 72).
  • the SINR distribution curve may be generated by the base station 18, the D2D mobile terminal 14, or the other terminal 16, or may be created by an entity outside of the communication network 10 and stored in a memory device which may be accessed by the D2D mobile terminal 14.
  • the D2D mobile terminal may determine a threshold SINR value by finding the first location on the SINR distribution curve that corresponds with the value (i.e., 100%-the scheduling activity factor) on the vertical axis, and then, determining the location on the horizontal axis that corresponds with the first location to determine the threshold SINR value.
  • the apparatus 20 may determine a measured (or actual) SINR value by performing an internal measurement process (block 74).
  • another device or an external device may calculate the measured SINR value for the D2D mobile terminal.
  • This SINR value comprises the measured SINR for the D2D mobile terminal 14.
  • the apparatus 20 may transmit data indicative of the measured SINR value to the base station 18 (block 76). If the SINR measured value does not exceed the threshold SINR value, then the D2D mobile terminal 14 does not report the SINR to the base station 18 as to avoid interference with scheduling calculations. If the SINR measured value does exceed the threshold SINR value and is reported to the base station 18, and the SINR value is utilized by the base station in the scheduling calculations, which may comprise without limitation, PF scheduling calculations. In addition, the reported SINR would be also used for base station controlled D2D link adaptation.
  • the various embodiments of the present invention present many advantages over the prior art. For example, in a hybrid communications network including D2D and other mobile terminals such as cellular devices, packet scheduling will not always favor the D2D device, which will result in fairer and more equalized packet scheduling between D2D mobile terminals and other mobile terminals. Thus, the various example embodiments perform PF scheduling in a manner that more uniformly considers the division and scheduling of resources for both cellular and D2D devices such that packets from D2D mobile terminals are not overscheduled relative to cellular or other mobile terminals.

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

Abstract

L'invention concerne des procédés, un dispositif et des produits de programme informatique qui permettent de mettre en oeuvre un ordonnancement dans un réseau de télécommunication hybride comportant divers types de dispositifs, tels que des terminaux mobiles dispositif à dispositif (D2D), et d'autres terminaux, tels que des terminaux mobiles cellulaires. Pour ce faire, un facteur d'activité d'ordonnancement D2D est calculé par un noeud de réseau, au moins en partie sur la base du nombre total des terminaux mobiles D2D et des autres terminaux mobiles, et ce facteur d'activité d'ordonnancement D2D est envoyé à au moins un terminal mobile D2D. Le terminal mobile D2D utilise le facteur d'activité d'ordonnancement pour déterminer le moment auquel il va transmettre à un noeud de réseau des données de rapport signal/brouillage + bruit (SINR) mesurées localement. Le terminal mobile D2D peut être ordonnancé par le noeud de réseau d'une manière séparée par rapport aux autres terminaux mobiles, au moins en partie sur la base des données de SINR.
PCT/IB2012/053492 2011-07-11 2012-07-09 Ordonnancement de paquets dans un réseau de télécommunication cellulaire en vue de l'établissement de télécommunications de dispositif à dispositif WO2013008167A1 (fr)

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CN201280034274.1A CN103688587A (zh) 2011-07-11 2012-07-09 为了设备到设备通信目的的蜂窝通信网络中的分组调度
DE112012002945.3T DE112012002945T5 (de) 2011-07-11 2012-07-09 Paketplanung in einem Mobilkommunikationsnetzwerk für Einrichtung-zu-Einrichtung-Kommunikationen

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US13/180,033 2011-07-11
GB1111854.4A GB2493131B (en) 2011-07-11 2011-07-11 Packet scheduling in a communication network
US13/180,033 US8675580B2 (en) 2011-07-11 2011-07-11 Method and apparatus for facilitating packet scheduling for a hybrid communication network

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