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WO2012160539A1 - Commande d'attribution de ressources - Google Patents

Commande d'attribution de ressources Download PDF

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Publication number
WO2012160539A1
WO2012160539A1 PCT/IB2012/052616 IB2012052616W WO2012160539A1 WO 2012160539 A1 WO2012160539 A1 WO 2012160539A1 IB 2012052616 W IB2012052616 W IB 2012052616W WO 2012160539 A1 WO2012160539 A1 WO 2012160539A1
Authority
WO
WIPO (PCT)
Prior art keywords
resource allocation
assignment
transmission
metric
logical channels
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IB2012/052616
Other languages
English (en)
Inventor
Sami-Jukka Hakola
Timo Koskela
Samuli Turtinen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renesas Electronics Corp
Original Assignee
Renesas Mobile Corp
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 GB1108706.1A external-priority patent/GB2491138B/en
Priority claimed from US13/114,524 external-priority patent/US8731590B2/en
Application filed by Renesas Mobile Corp filed Critical Renesas Mobile Corp
Priority to CN201280035143.5A priority Critical patent/CN104041159A/zh
Priority to DE112012002211.4T priority patent/DE112012002211B4/de
Publication of WO2012160539A1 publication Critical patent/WO2012160539A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • 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
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/563—Allocation or scheduling criteria for wireless resources based on priority criteria of the wireless resources

Definitions

  • the present invention relates to resource allocation control. More specifically, the present invention relates to measures (including methods, apparatuses and computer program products) for resource allocation control.
  • resource allocation and resource sharing represent important issues. This is particularly due to the fact that a band (i.e. frequency spectrum), on which resources are available for a specific communication or system, and thus the resources are limited. Therefore, available resources are to be commonly used by a plurality of communicating devices. Such common usage of resources may manifest in the common usage of logical channels or radio bearers between communicating devices.
  • a band i.e. frequency spectrum
  • an amount of resources may be allocated or assigned (scheduled) for a number of communicating devices for their common use. In a cellular communication environment, this may be typically carried out by an access node or base station for (groups of) terminals and other communicating devices in its coverage area, respectively.
  • a sharing balance of resources may be allocated or assigned (scheduled) for communicating devices for defining their respective relation of the commonly allocated resources for their individual use.
  • this may be carried out by an access node or base station for (groups of) terminals and other communicating devices in its coverage area, respectively.
  • D2D device-to- device
  • UE user equipments
  • this may also be carried out in a coordinated manner between the communicating devices participating in a D2D communication.
  • Such a problem is particularly relevant when the resource allocation amount is controlled by the network, while the resource sharing balance is controlled by the communicating devices themselves.
  • an appropriate coordination of resource allocation and sharing may be difficult to accomplish.
  • it may be problematic exchanging reliable parameters suitable for an appropriate and fair resource allocation and sharing between communicating devices.
  • this parameter may not reveal how used resource sharing of allocated radio resources corresponds to configured QoS settings for devices in a common D2D or uplink communication.
  • a method of controlling resource allocation comprising obtaining a resource allocation assignment including at least an assignment of a resource allocation amount of granted resources for transmission, allocating resources out of the granted resources to logical channels, for which data is available for transmission, according to a priority and a prioritized bit rate of each logical channel, and calculating a metric indicative of a result of the resource allocation in terms of at least one of requirements of the prioritized bit rates of the logical channels and the available data of the logical channels.
  • the resource allocation may comprise a first round of allocating resources to the logical channels in a decreasing order of priority of each logical channel up to a prioritized bit rate of each logical channel
  • the method may further comprise determining whether, as a result of the first round of resource allocation, the granted resources are sufficient for fulfilling the requirements of the prioritized bit rates or the available data of the logical channels.
  • the metric calculation may comprise summing a data amount of the logical channels, which is not allocated by the first round of resource allocation, and which is necessary to be allocated for fulfilling the requirements of the prioritized bit rates or the available data of the logical channels, if it is determined that the granted resources are not sufficient.
  • the resource allocation may further comprise a second round of allocating resources, which are not allocated by the first round of resource allocation, to the logical channels in a decreasing order of priority of each logical channel.
  • the metric calculation may comprise summing a data amount of the logical channels, which is allocated by the second round of resource allocation.
  • a method of controlling resource allocation comprising providing, to at least one device involved in a transmission, a resource allocation assignment including at least an assignment of a resource allocation amount of granted resources for the transmission, receiving, from said at least one device, a metric indicative of a result of resource allocation at said at least one device in terms of at least one of requirements of prioritized bit rates and available transmission data of logical channels, evaluating the received at least one metric with respect to the resource allocation assignment, and modifying the resource allocation assignment based on a result of the evaluation, and providing, to said at least one device, the modified resource allocation assignment.
  • an apparatus for use in controlling resource allocation comprising an interface configured for communication with at least another apparatus, and a processing system configured to obtain, via the interface, a resource allocation assignment including at least an assignment of a resource allocation amount of granted resources for transmission, allocate resources out of the granted resources to logical channels, for which data is available for transmission, according to a priority and a prioritized bit rate of each logical channel, and calculate a metric indicative of a result of the resource allocation in terms of at least one of requirements of the prioritized bit rates of the logical channels and the available data of the logical channels.
  • the processing system may be configured to perform a first round of allocating resources to the logical channels in a decreasing order of priority of each logical channel up to a prioritized bit rate of each logical channel, and to determine whether, as a result of the first round of resource allocation, the granted resources are sufficient for fulfilling the requirements of the prioritized bit rates or the available data of the logical channels.
  • the processing system may be further configured to sum, for metric calculation, a data amount of the logical channels, which is not allocated by the first round of resource allocation, and which is necessary to be allocated for fulfilling the requirements of the prioritized bit rates or the available data of the logical channels, if it is determined that the granted resources are not sufficient.
  • the processing system may be configured to perform a second round of allocating resources, which are not allocated by the first round of resource allocation, to the logical channels in a decreasing order of priority of each logical channel.
  • the processing system may be further configured to sum, for metric calculation, a data amount of the logical channels, which is allocated by the second round of resource allocation.
  • an apparatus for use in controlling resource allocation comprising an interface configured for communication with at least another apparatus, and a processing system configured to provide, to at least one device involved in a transmission via the interface, a resource allocation assignment including at least an assignment of a resource allocation amount of granted resources for the transmission, receive, from said at least one device via the interface, a metric indicative of a result of resource allocation at said at least one device in terms of at least one of requirements of prioritized bit rates and available transmission data of logical channels, evaluate the received at least one metric with respect to the resource allocation assignment, and modify the resource allocation assignment based on a result of the evaluation, and provide, to said at least one device via the interface, the modified resource allocation assignment.
  • a computer program product comprising a non-transitory computer-readable storage medium having computer readable instructions stored thereon, the computer readable instructions being executable by a computerized device to cause the computerized device to perform a method for controlling resource allocation according to perform the method of the first or second embodiments.
  • resource allocation control More specifically, by way of embodiments of the present invention, there are provided measures and mechanisms for resource allocation control (which may for example be applicable for shared logical channels).
  • Figure 1 shows a schematic diagram of a deployment scenario for which embodiments of the present invention are applicable
  • Figure 2 shows a flowchart illustrating an example of a procedure which is operable at or by a terminal according to embodiments of the present invention
  • Figure 3 shows a flowchart illustrating an example of a metric calculation procedure which is operable at or by a terminal according to embodiments of the present invention
  • Figure 4 shows a schematic diagram for explaining a relation between data amounts of transmission data and data amounts according to prioritized bit rates and allocated bit rates in case of sufficiency of available resources for a resource allocation control according to embodiments of the present invention
  • Figure 5 shows a schematic diagram for explaining a relation between data amounts of transmission data and data amounts according to prioritized bit rates and allocated bit rates in case of insufficiency of available resources for a resource allocation control according to embodiments of the present invention
  • Figure 6 shows a flowchart illustrating another example of a procedure which is operable at or by a network entity according to embodiments of the present invention
  • Figure 7 shows a signaling diagram of an procedure according to embodiments of the present invention.
  • Figure 8 shows a block diagram illustrating apparatuses according to embodiments of the present invention.
  • LTE- (including LTE-Advanced-) related cellular communication networks are used as non-limiting examples.
  • LTE- (including LTE-Advanced-) related cellular communication networks are used as non-limiting examples.
  • the description of embodiments given herein specifically refers to terminology which is directly related thereto. Such terminology is only used in the context of the presented non-limiting examples, and does naturally not limit the invention in any way. Rather, any other communication systems, bands, network configurations or system deployments, etc. may also be utilized as long as compliant with the features described herein.
  • Figure 1 shows a schematic diagram of an deployment scenario for which embodiments of the present invention are applicable.
  • a cellular communication network such as e.g. a LTE network.
  • An eNB represents an access node or base station of the communication network, which controls the served terminals in its coverage area.
  • the terminals UEl to UE4 are capable of communicating via the cellular communication network, i.e. via the eNB, and the terminal UE3 is also capable of communicating via a local area network, such as a WLAN, an access point of which is denoted by AP.
  • the terminals UEl and UE2 may establish a (network/eNB-controlled) D2D communication between each other, the terminal may establish a (network/eNB-controlled) uplink communication with a WLAN access point (which may serve for cellular offloading purposes, for example), and the terminal UE4 may establish a (network eNB-controlled) uplink communication with the cellular communication network such as the LTE.
  • a WLAN access point which may serve for cellular offloading purposes, for example
  • the terminal UE4 may establish a (network eNB-controlled) uplink communication with the cellular communication network such as the LTE.
  • the D2D communication may be established on a licensed band/spectrum (of the cellular communication network such as the LTE) or an unlicensed band/spectrum
  • the uplink WLAN communication may be established on an unlicensed band/spectrum (of the WLAN)
  • the uplink cellular communication may be established on a licensed band/spectrum (of the cellular communication network such as the LTE).
  • signaling procedures could be performed over the illustrated signaling connections.
  • An unlicensed band may be located on one or more of the 2.4 GHz range, the 6 GHz range, any sub-gigahertz ISM range, and the local area network may be based on any IEEE802.
  • i l specification including e.g. 802.11 ah, 802.1 laf, 802.1 lac, and the like).
  • a QoS parameter called the Prioritized Bit Rate (PBR) is specified for an uplink communication per radio bearer.
  • the PBR is the data rate provided to one logical channel before allocating any transmission resource to a lower-priority logical channel.
  • the PBR is introduced to avoid a so-called uplink scheduling starvation problem that may occur for a terminal with multiple configured radio bearers.
  • the PBR is not necessarily related to a Guaranteed Bit Rate (GBR) parameter signaled via the SI interface to the eNB, i.e. a PBR can also be defined for non-GBR radio bearers.
  • GBR Guaranteed Bit Rate
  • a rate control functionality per bearer is introduced for sharing of uplink resources between radio bearers.
  • the uplink rate control function may be controlled, for example by the R C, by giving each bearer a priority and a PBR.
  • the uplink rate control function ensures that each terminal handles its radio bearer(s) such that all the radio bearer(s) are firstly served in decreasing priority order up to their respective PBR, and all the radio bearer(s) are subsequently served in decreasing priority order for the remaining resources.
  • Figure 2 shows a flowchart illustrating an example of a procedure which is operable at or by a terminal according to embodiments of the present invention.
  • a procedure according to embodiments of the present invention may comprise an operation (210) of obtaining a resource allocation assignment including at least an assignment of a resource allocation amount of granted resources for transmission, an operation (220) of allocating resources out of the granted resources to logical channels, for which data is available for transmission, according to a priority and a prioritized bit rate of each logical channel, and an operation (230) of calculating a metric indicative of a result of the resource allocation in terms of at least one of requirements of the prioritized bit rates of the logical channels and the available data of the logical channels.
  • the resource allocation assignment may comprise, in addition to or instead of an assignment of a resource allocation amount of granted resources for transmission (pertaining to a potential first stage of resource allocation), an assignment of a resource sharing balance of granted resources between devices involved in the transmission (pertaining to a potential second stage of resource allocation).
  • the resource allocation operation may comprise a first round of allocating resources to the logical channels in a decreasing order of priority of each logical channel up to a prioritized bit rate of each logical channel or said first round of allocating resources together with a second round of allocating resources, which are not allocated by the first round of resource allocation, to the logical channels in a decreasing order of priority of each logical channel.
  • the calculated (terminal- side) metric may be provided between a terminal/device and a network entity such as an access node or base station for the access node or base station to be able to make possible corrective actions related to a first stage of resource allocation and/or a second stage resource sharing amongst the devices, and/or between two terminals/devices for them to be able to make a pair-wise re-allocation in second stage resource sharing.
  • a network entity such as an access node or base station for the access node or base station to be able to make possible corrective actions related to a first stage of resource allocation and/or a second stage resource sharing amongst the devices, and/or between two terminals/devices for them to be able to make a pair-wise re-allocation in second stage resource sharing.
  • the calculated (terminal-side) metric may specifically be sent (either proactively, periodically, or upon request or query) to an access node or base station of the serving cell of a cellular communication network (from which the resource allocation assignment may have been received beforehand). Then, a modified resource allocation assignment, including at least one of an assignment of a resource allocation amount of granted resources for transmission and an assignment of a resource sharing balance of granted resources between devices involved in the transmission, may be received from the access node or base station of the serving cell, and the subsequent resource allocation (for D2D or UL communications) may be carried out based on the modified resource allocation assignment.
  • the calculated (terminal- side) metric may specifically be sent to a device, i.e. another terminal, involved in a D2D communication with which the transmission is related. Then, a modified resource allocation assignment, including an assignment of a resource sharing balance of granted resources with said device, may be obtained from said device, i.e. terminal. The subsequent resource allocation (for D2D communications) may then be carried out based on the modified resource allocation assignment. Additionally or alternatively, a corresponding (terminal- side) metric of said device may be received from said device, a modified resource allocation assignment, including an assignment of a resource sharing balance of granted resources with said device based on the calculated metric and the received metric, may be locally established and provided to said device. The subsequent resource allocation (for D2D communications) may then be carried out based on the modified resource allocation assignment for both the terminal in question and the other terminal in communication.
  • Figure 3 shows a flowchart illustrating an example of a metric calculation procedure which is operable at or by a terminal according to embodiments of the present invention.
  • the procedure according to Figure 3 is based on a MAC PDU assembly and multiplexing operation exhibiting a functionality of logical channel prioritization.
  • Such logical channel prioritization in MAC PDU assembly and multiplexing, upon which embodiments of the present invention are based, is applicable when a new transmission is (to be) performed.
  • scheduling of data may be controlled (e.g. by RRC) on the basis of, at least, a priority and a prioritized bit rate, which parameters may be signaled and assigned for each logical channel on which data is to be transmitted.
  • Each terminal shall maintain a variable Bj for each logical channel j.
  • the variable Bj shall be initialized to zero when the related logical channel is established, and shall be incremented by the product PBR x TTI duration for each TTI, where PBR is the prioritized bit rate of logical channel j.
  • the value of Bj can be negative but shall never exceed a bucket size and, if the value of Bj is larger than the bucket size of logical channel j, it shall be set to the bucket size.
  • the bucket size of a logical channel is equal to the product PBR x BSD, where BSD is the bucket size duration of logical channel j, and PBR and BSD are configurable by upper layers.
  • the terminal may perform a logical channel prioritization procedure in MAC PDU assembly and multiplexing when a new transmission is (to be) performed.
  • Step 1 resources are allocated to logical channels, for which data is available for transmission, in a decreasing order of priority of each logical channel up to the prioritized bit rate of each logical channel. That is, all the logical channels with Bj > 0 are allocated resources in a decreasing priority order.
  • the terminal shall allocate resources for all the data that is available for transmission on the radio bearer before meeting the PBR of the lower priority radio bearer(s).
  • Step 2 in Figure 3 the terminal shall decrement the value of Bj by the total size of MAC SDUs (i.e. the allocatable size or payload of the MAC PDU) served to logical channel j in Step 1 above.
  • the granted resources are sufficient for fulfilling the requirements of the prioritized bit rates or the available data of the logical channels. That is, it may be determined (discriminated) whether the MAC PDU is filled up with data before either a minimum of PBR amount of data or available data per each logical channel is served.
  • the requirements of the prioritized bit rates or the available data of the logical channels may be fulfilled when the prioritized bit rate is provided for each logical channel where the available data for transmission equals or exceeds a data amount according to the prioritized bit rate, and all of the available data is allocated for each logical channel where a data amount according to the prioritized bit rate exceeds the available data for transmission.
  • a metric (denoted as TX metric) is calculated which is indicative of a result of the resource allocation in terms of at least one of requirements of the prioritized bit rates of the logical channels and the available data of the logical channels.
  • the metric may in this case be calculated by summing a data amount of the logical channels, which is not allocated by the first round of resource allocation, and which is necessary to be allocated for fulfilling the requirements of the prioritized bit rates or the available data of the logical channel.
  • the procedure proceeds as follows.
  • Step 3 in Figure 3 resources, which are not allocated by the first round of resource allocation, are allocated to logical channels, for which data is still available for transmission, in a decreasing order of priority of each logical channel. That is, if any resources remain, all the logical channels are served in a strict decreasing priority order (regardless of the value of Bj) until either the data for that logical channel or the resource assignment (i.e. the allocatable size or payload of the MAC PDU) is exhausted, whichever comes first. Logical channels configured with equal priority should be served equally in this round.
  • a metric (denoted as TX metric) is calculated which is indicative of a result of the resource allocation in terms of at least one of requirements of the prioritized bit rates of the logical channels and the available data of the logical channels.
  • the metric may in this case be calculated by summing a data amount of the logical channels, which is allocated by the second round of resource allocation, i.e. an aggregated data amount of Step 3.
  • the aforementioned metric may be applicable for any one of a D2D communication between terminals, thus representing a D2D_metric, and an uplink communication between a terminal and a network entity such as an access node or base station of a cellular communication network (e.g. eNB of LTE) or an access point of a local area network (e.g. AP of WLAN), thus representing an UL metric.
  • a network entity such as an access node or base station of a cellular communication network (e.g. eNB of LTE) or an access point of a local area network (e.g. AP of WLAN), thus representing an UL metric.
  • the metric calculation may be based on the thus calculated data amount, and may for example additionally comprise averaging the summed data amount of the logical channels and/or forming a ratio of the (averaged) summed data amount with an amount of the granted resources.
  • the length of averaging may be controlled (optimized) by the network so as to properly balance the accuracy of control and required signaling between the communicating devices (including e.g. UEs and eNB/AP).
  • Figure 4 shows a schematic diagram for explaining a relation between data amounts of transmission data and data amounts according to prioritized bit rates and allocated bit rates in case of sufficiency of available resources for a resource allocation control according to embodiments of the present invention. That is, Figure 4 represents a configuration according to a negative determination (discrimination) in the procedure of Figure 3.
  • the white block arrows indicate resources allocated in the first round of resource allocation (i.e. in Step 1 of Figure 3), and the black block arrows indicate resources allocated in the second round of resource allocation (i.e. in Step 3 of Figure 3).
  • the metric according to embodiments of the present invention will be positive, and the (absolute) value thereof will be in relation to the (sum of) lengths of the black block arrows. As indicated above, such a length-related sum may also be averaged and/or used for forming a ratio with an amount of the granted resources, e.g. the (sum of) lengths of the black and white block arrows.
  • Figure 5 shows a schematic diagram for explaining a relation between data amounts of transmission data and data amounts according to prioritized bit rates and allocated bit rates in case of insufficiency of available resources for a resource allocation control according to embodiments of the present invention. That is, Figure 5 represents a configuration according to an affirmative determination (discrimination) in the procedure of Figure 3.
  • the white block arrows indicate resources allocated in the first round of resource allocation (i.e. in Step 1 of Figure 3), and the grey horizontal- line block arrows indicate resources which are not allocated in the first round of resource allocation, i.e. the resources which would still need to be allocated for fulfilling the PBR requirements of the logical channels.
  • requirements of prioritized bit rates remain for logical channels 3 and 4.
  • the metric according to embodiments of the present invention will be negative, and the (absolute) value thereof will be in relation to the (sum of) lengths of the grey horizontal- line block arrows. As indicated above, such a length-related sum may also be averaged and/or used for forming a ratio with an amount of the granted resources, e.g. the (sum of) lengths of the white block arrows.
  • Figure 6 shows a flowchart illustrating another example of a procedure which is operable at or by a network entity, e.g. an eNB, according to embodiments of the present invention.
  • a procedure according to embodiments of the present invention may comprise an operation (610) of providing, to at least one device involved in a transmission, i.e. a terminal, a resource allocation assignment including at least an assignment of a resource allocation amount of granted resources for the transmission, an operation (620) of receiving, from said at least one device, a metric indicative of a result of resource allocation at said at least one device in terms of at least one of requirements of prioritized bit rates and available transmission data of logical channels, an operation (630) of evaluating the received at least one metric with respect to the resource allocation assignment, and an operation (640) of modifying the resource allocation assignment based on a result of the evaluation, and providing, to said at least one device, the modified resource allocation assignment.
  • the metric evaluation and corresponding resource allocation assignment modification may be related to a first stage of resource allocation, i.e. the assignment of a resource amount to one or more terminals (for D2D or UL communications), and/or a second stage of resource allocation, i.e. the assignment of a resource sharing balance between at least two terminals (for D2D or UL communications).
  • the eNB may assess the compliance of a presently achievable resource allocation with the QoS settings of the involved logical channel or channels. Namely, the eNB is able notice a possible imbalance in the achieved QoS of configured logical channels (or radio bearers) by individual devices e.g. in a D2D communication, and/or an excessive amount of resources or insufficient amount of resources assigned to the plural (in particular, two) devices as a whole. The eNB can then react either by re-allocating more or less radio resources for the devices as a whole or sending a relative resource sharing message to command the current resource sharing conditions between the devices to be changed according to given relative amounts.
  • embodiments of the present invention provide for a mechanism for the serving network entity to control how well QoS is provided (QoS settings are satisfied) in overall resource allocation (of first stage) as well as in shared resource allocation (of second stage) in which the network entity may or may not be directly involved.
  • the metric evaluation may comprise adding all received metrics and basing the modification on the thus resulting sum of metrics. If the sum is negative, which indicates that not enough resources are available for the one or more terminals, the resource allocation amount of granted resources for the transmission may be increased. Otherwise, if the sum is positive and larger than a predetermined threshold, which indicates that (more than) enough resources are available for the one or more terminals, the resource allocation amount of granted resources for the transmission may be decreased.
  • the metric evaluation may comprise forming an absolute value of a difference between two received metrics of a pair of terminals involved in a (D2D) transmission. If the absolute value is larger than a predetermined threshold, an assignment of a resource sharing balance of granted resources for the device with the lower metric may be increased while an assignment of the resource sharing balance of granted resources for the device with the higher metric may be decreased. Thereby, the resource sharing relation between the devices may be balanced. If the absolute value is smaller than a predetermined threshold, no action is required, since it is assumed that the resource sharing relation between the devices is appropriately balanced.
  • Figure 7 shows a signaling diagram of an procedure according to embodiments of the present invention.
  • two devices represent a D2D pair, i.e. the relevant transmission, for which resources are to be allocated, relates to a D2D communication between Device#l and Device#2.
  • another scenario may be equally conceived and applied accordingly.
  • the two devices may be two terminals trying to transmit UL data on respective UL transmissions to the eNB using a commonly assigned resource pool.
  • the eNB may configure corresponding (D2D) bearers (or logical channels) to the two devices involved in the respective transmission.
  • Such configuration may comprise a corresponding resource allocation assignment and setting data of the respective logical channel or channels, respectively.
  • the two devices may report their corresponding metrics (denoted as D2D_metrics here) to the eNB.
  • the eNB may be provided with correspondingly modified resource allocation assignments, respectively.
  • Such modified resource allocation assignment may relate to the resource amount for both devices, which is to be signaled to both devices, and/or the resource sharing balance between the two devices, which is to be signaled to at least one of the two devices.
  • the metrics of the individual devices may also be exchanged between the devices as such without involving the eNB or the like.
  • the above-described procedures and functions may be implemented by respective functional elements, processors, processing system or the like, as described below.
  • the processing system may be in the form of processing circuitry including one or more processors, for example embodied as a chip or chip set, and may include one or more memories and one or more interfaces.
  • the solid line blocks are basically configured to perform respective operations as described above.
  • the entirety of solid line blocks are basically configured to perform the methods and operations as described above, respectively.
  • the individual blocks are meant to illustrate respective functional blocks implementing a respective function, process or procedure, respectively.
  • Such functional blocks are implementation- independent, i.e. may be implemented by means of any kind of hardware or software, respectively.
  • the arrows and lines interconnecting individual blocks are meant to illustrate an operational coupling there-between, which may be a physical and/or logical coupling, which on the one hand is implementation-independent (e.g. wired or wireless) and on the other hand may also comprise an arbitrary number of intermediary functional entities not shown.
  • the direction of an arrow is meant to illustrate the direction in which certain operations are performed and/or the direction in which certain data is transferred.
  • Figure 8 shows a block diagram illustrating apparatuses according to embodiments of the present invention.
  • the thus described apparatus 10 (or 30) may represent a (part of a) device, terminal or user equipment UE, as described above, and may be configured to perform a procedure and/or exhibit a functionality as described in conjunction with any one of Figures 2, 3, and 7.
  • the thus described apparatus 20 may represent a (part of a) network entity, i.e. base station or access node or controller, such as for example a NodeB, an eNB, a R C, or the like, as described above, and may be configured to perform a procedure and/or exhibit a functionality as described in conjunction with any one of Figures 6 and 7.
  • a device, terminal or user equipment 10 (or 30) comprises a processor 11, a memory 12, and an interface 13, which are connected by a bus 15 or the like, and a network entity 20 comprises a processor 21, a memory 22, and an interface 23, which are connected by a bus 25 or the like.
  • the device, terminal or user equipment 10 may be connected with the network entity 20 through a link or connection 40, the device, terminal or user equipment 10 may be connected with the device, terminal or user equipment 30 through a link or connection 50, and the device, terminal or user equipment 30 may optionally be connected with the network entity 20 through a link or connection 60.
  • the memories 12 and 22 may store respective programs assumed to include program instructions that, when executed by the associated processors 11 and 21, enable the respective electronic device or apparatus to operate in accordance with the embodiments of the present invention.
  • the processors 11 and 21 and/or the interfaces 13 and 23 may also include a modem or the like to facilitate communication over the (hardwire or wireless) link 40, respectively.
  • the interfaces 13 and 23 may include a suitable transceiver coupled to one or more antennas or communication means for (hardwire or wireless) communications with the linked or connected device(s), respectively.
  • the interfaces 13 and 23 are generally configured to communicate with another apparatus, i.e. the interface thereof.
  • the respective devices/apparatuses may represent means for performing respective operations and/or exhibiting respective functionalities, and/or the respective devices (and/or parts thereof) may have functions for performing respective operations and/or exhibiting respective functionalities.
  • the interface 13 is configured for communication with at least another apparatus.
  • the processor 1 1 is configured to obtain, via the interface 13, a resource allocation assignment including at least an assignment of a resource allocation amount of granted resources for transmission, to allocate resources out of the granted resources to logical channels, for which data is available for transmission, according to a priority and a prioritized bit rate of each logical channel, and to calculate a metric indicative of a result of the resource allocation in terms of at least one of requirements of the prioritized bit rates of the logical channels and the available data of the logical channels.
  • the processor 11 may be configured to perform a first round of allocating resources to the logical channels in a decreasing order of priority of each logical channel up to a prioritized bit rate of each logical channel, to determine whether, as a result of the first round of resource allocation, the granted resources are sufficient for fulfilling the requirements of the prioritized bit rates or the available data of the logical channels, and to sum, for metric calculation, a data amount of the logical channels, which is not allocated by the first round of resource allocation, and which is necessary to be allocated for fulfilling the requirements of the prioritized bit rates or the available data of the logical channels, if it is determined that the granted resources are not sufficient.
  • the processor 11 may be configured to perform a second round of allocating resources, which are not allocated by the first round of resource allocation, to the logical channels in a decreasing order of priority of each logical channel, and to sum, for metric calculation, a data amount of the logical channels, which is allocated by the second round of resource allocation.
  • the processor 11 may be configured to, for metric calculation, at least one of average the summed data amount of the logical channels and form a ratio with an amount of the granted resources.
  • the processor 11 may be configured to send, via the interface 13, the calculated metric to an access node 20, and to obtain, from the access node 20 via the interface 13, a modified resource allocation assignment including at least one of an assignment of a resource allocation amount of granted resources for transmission and an assignment of a resource sharing balance of granted resources between devices involved in the transmission.
  • the processor 11 may be configured to send, via the interface 13, the calculated metric to a device 30 involved in the transmission, and to obtain, from said device 30 via the interface 13, a modified resource allocation assignment including an assignment of a resource sharing balance of granted resources with said device
  • the processor 11 may be configured to receive, from a device 30 involved in the transmission via the interface 13, the metric of said device, to establish a modified resource allocation assignment including an assignment of a resource sharing balance of granted resources with said device based on the calculated metric and the received metric, and to provide, via the interface 13, the modified resource allocation assignment to said device 30.
  • the processor 11, the memory 12 and the interface 13 can be implemented as individual modules, chipsets or the like, or one or more of them can be implemented as a common module, chipset or the like.
  • the interface 23 is configured for communication with at least another apparatus.
  • the processor 21 is configured to provide, to at least one device 10 involved in a transmission via the interface 23, a resource allocation assignment including at least an assignment of a resource allocation amount of granted resources for the transmission, to receive, from said at least one device 10 via the interface 23, a metric indicative of a result of resource allocation at said at least one device in terms of at least one of requirements of prioritized bit rates and available transmission data of logical channels, to evaluate the received at least one metric with respect to the resource allocation assignment, and to modify the resource allocation assignment based on a result of the evaluation, and provide, to said at least one device 10 via the interface 23, the modified resource allocation assignment.
  • the processor 21 may be configured to, for the metric evaluation, add all received metrics, and to, for the resource allocation assignment modification, increase the resource allocation amount of granted resources for the transmission according to the addition result, if the addition result is negative, and decrease the resource allocation amount of granted resources for the transmission according to the addition result, if the addition result is positive and larger than a predetermined threshold.
  • the processor 21 may be configured to, for the metric evaluation, form an absolute value of a difference between two received metrics of a pair of devices involved in the transmission, and to, for the resource allocation assignment modification, increase an assignment of a resource sharing balance of granted resources for the device with the lower metric and decrease an assignment of the resource sharing balance of granted resources for the device with the higher metric, if the absolute value is larger than a predetermined threshold.
  • the processor 21, the memory 122 and the interface 23 can be implemented as individual modules, chipsets or the like, or one or more of them can be implemented as a common module, chipset or the like.
  • a system may comprise any conceivable combination of the thus depicted devices/apparatuses and other network elements, which are configured to cooperate as described above.
  • respective functional blocks or elements according to above-described aspects can be implemented by any known means, either in hardware and/or software, respectively, if it is only adapted to perform the described functions of the respective parts.
  • the mentioned method steps can be realized in individual functional blocks or by individual devices, or one or more of the method steps can be realized in a single functional block or by a single device.
  • any method step is suitable to be implemented as software or by hardware without changing the idea of the present invention.
  • Such software may be software code independent and can be specified using any known or future developed programming language, such as e.g. Java, C++, C, and Assembler, as long as the functionality defined by the method steps is preserved.
  • Such hardware may be hardware type independent and can be implemented using any known or future developed hardware technology or any hybrids of these, such as MOS (Metal Oxide Semiconductor), CMOS (Complementary MOS), BiMOS (Bipolar MOS), BiCMOS (Bipolar CMOS), ECL (Emitter Coupled Logic), TTL (Transistor-Transistor Logic), etc., using for example ASIC (Application Specific IC (Integrated Circuit)) components, FPGA (Field- programmable Gate Arrays) components, CPLD (Complex Programmable Logic Device) components or DSP (Digital Signal Processor) components.
  • MOS Metal Oxide Semiconductor
  • CMOS Complementary MOS
  • BiMOS Bipolar MOS
  • BiCMOS BiCMOS
  • ECL Emitter Coupled Logic
  • TTL Transistor-Transistor Logic
  • a device/apparatus may be represented by a semiconductor chip, a chipset, or a (hardware) module comprising such chip or chipset; this, however, does not exclude the possibility that a functionality of a device/apparatus or module, instead of being hardware implemented, be implemented as software in a (software) module such as a computer program or a computer program product comprising executable software code portions for execution/being run on one or more processors or processing system.
  • a device may be regarded as a device/apparatus or as an assembly of more than one device/apparatus, whether functionally in cooperation with each other or functionally independently of each other but in a same device housing, for example.
  • Devices and means can be implemented as individual devices, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device is preserved. Such and similar principles are to be considered as known to a skilled person.
  • Software in the sense of the present description comprises software code as such comprising code means or portions or a computer program or a computer program product for performing the respective functions, as well as software (or a computer program or a computer program product) embodied on a tangible medium such as a computer-readable (storage) medium having stored thereon a respective data structure or code means/portions or embodied in a signal or in a chip, potentially during processing thereof.
  • the present invention also covers any conceivable combination of method steps and operations described above, and any conceivable combination of nodes, apparatuses, modules or elements described above, as long as the above-described concepts of methodology and structural arrangement are applicable.
  • Such measures may comprise allocating resources based on a resource allocation assignment including at least an assignment of a resource allocation amount of granted resources for transmission to logical channels, for which data is available for transmission, according to a priority and a prioritized bit rate of each logical channel, and calculating a metric indicative of a result of the resource allocation in terms of at least one of requirements of the prioritized bit rates of the logical channels and the available data of the logical channels.
  • Such measures may also comprise receiving, from at least one device, a metric indicative of a result of resource allocation at said at least one device in terms of at least one of requirements of prioritized bit rates and available transmission data of logical channels, evaluating the received at least one metric with respect to a resource allocation assignment, and modifying the resource allocation assignment based on a result of the evaluation.

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

Abstract

La présente invention porte sur des mesures destinées à une commande d'attribution de ressources, comprenant par exemple une attribution de ressources en fonction d'une affectation d'attribution de ressources comprenant au moins une affectation d'une quantité d'attribution de ressources pour des ressources octroyées pour une transmission à des canaux logiques pour lesquels des données sont disponibles pour transmission selon une priorité et un débit binaire priorisé de chaque canal logique, et le calcul d'une mesure (metric) indiquant un résultat de l'attribution de ressources en termes d'au moins l'une des exigences parmi les débits binaires priorisés des canaux logiques et les données disponibles relatives aux canaux logiques.
PCT/IB2012/052616 2011-05-24 2012-05-24 Commande d'attribution de ressources Ceased WO2012160539A1 (fr)

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