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WO2013000516A1 - Détection et commande de congestion - Google Patents

Détection et commande de congestion Download PDF

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Publication number
WO2013000516A1
WO2013000516A1 PCT/EP2011/060984 EP2011060984W WO2013000516A1 WO 2013000516 A1 WO2013000516 A1 WO 2013000516A1 EP 2011060984 W EP2011060984 W EP 2011060984W WO 2013000516 A1 WO2013000516 A1 WO 2013000516A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
network element
session
congestion
controller
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/EP2011/060984
Other languages
English (en)
Inventor
Juha Antero Rasanen
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.)
Nokia Solutions and Networks Oy
Original Assignee
Nokia Siemens Networks Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Siemens Networks Oy filed Critical Nokia Siemens Networks Oy
Priority to PCT/EP2011/060984 priority Critical patent/WO2013000516A1/fr
Publication of WO2013000516A1 publication Critical patent/WO2013000516A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • H04L43/0882—Utilisation of link capacity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/822—Collecting or measuring resource availability data

Definitions

  • the present invention relates to apparatuses, methods and a computer program product for performing congestion detection and control.
  • E-UTRAN Evolved universal terrestrial radio access network
  • Embodiments of the present invention relate to user plane congestion management.
  • the embodiments of the invention may enable more efficient usage of network resources.
  • the granularity of the congestion information should be increased beyond the current binary "yes/no" indication (in order to be able to manage congestion situations more flexibly and efficiently).
  • a eN B sends congestion information by certain intervals to PCRF, and PCRF utilises that info. So, each element to be controlled needs to send the congestion info to PCRF at certain intervals which requires considerable network traffic and increases the network load, which would be contradictory to the aim to reduce congestion.
  • Embodiments of the present invention aim to provide to overcome the problems discussed above and to enable congestion detection and control without increasing network load.
  • an apparatus which comprises a controller configured to perform a policy control function, monitor at least one session related to a network element, and perform congestion control based on the at least one monitored session.
  • a method which comprises performing a policy control function, monitoring at least one session related to a network element, and performing congestion control based on the at least one monitored session.
  • Fig. 1 shows a basic structure of a PCRF according to an embodiment of the present invention
  • Fig. 2 shows a non-roaming architecture for 3GPP accesses, in which the arrangement of a PCRF is illustrated, Fig. 3 shows operations when a new IP-CAN session is established and the level of congestion and/or required actions threshold is reached for a given network element according to an embodiment of the present invention, and Fig. 4 illustrates the basic structure of a DRA as a master network control element for a plurality of PCRFs.
  • measures are provided by which congestion in a network can be controlled.
  • a method and an apparatus are provided, which perform a policy related control, and which monitor at least one session related to a network element and perform congestion control based on the at least one monitored session.
  • the apparatus may be a network control element relating to policy and charging control (e.g., a PCRF) or a part thereof.
  • the PCRF comprises an interface 1 1 , which provides a connection to a network, a controller 12 which carries out a policy related control, monitors the at least one session related to a network element and performs a congestion control as mentioned above, and a memory 13, in which several programs and data for carrying out the functions according to the embodiment are stored.
  • the interface 1 1 , the controller 12 and the memory 13 may be inter-connected by a suitable connection 14, e.g., a bus or the like.
  • a network element which carries out a policy related control also monitors sessions of a network element. In this way, impacts on other network elements and signalling between them can be minimized to or close to zero. Monitoring can be effected such that, when the apparatus receives a request for a session, the apparatus binds this session to records related to the network element. With respect to Fig. 1 , such a request can be received via the interface 1 1 . Furthermore, sessions of a plurality of network elements can be monitored, and some network elements can be considered in a combined manner. Hence, sessions of a group of network elements as a network part can be monitored in combination, so that a congestion control can be effected with respect to this network part or group of network elements.
  • the apparatus described above may be provided within a network control element such as a PCRF.
  • a network control element such as a PCRF.
  • the arrangement of the PCRF within the 3GPP architecture reference model is described in the following by referring to Fig. 2, which reproduces Fig. 4.2.1 -1 of 3GPP TS 23.401 V10.5 (201 1 -06) and illustrates the non-roaming architecture for 3GPP accesses.
  • the PCRF is connected with a PDN Gateway, wherein a Gx reference point is defined between the PCRF and the PDN Gateway. Moreover, the PCRF is also connected to operator's IP services (e.g., IMS, PSS etc.), wherein on this connection an Rx reference point is defined.
  • the PDN Gateway is connected with a Serving Gateway, which in turn is connected via E-UTRAN to the UE. Between the PDN Gateway, a reference point S5 is defined, which provides e.g., user plane tunnelling and tunnel management. Between the Serving Gateway and E-UTRAN, a reference point S1 -U is defined for the per bearer user plane tunnelling and inter eNodeB path switching during handover. Between the UE and E-UTRAN, a reference point LTE-Uu is defined.
  • the PCRF keeps track on IP-CAN sessions and especially on related authorized and active service data flows (SDFs) related to, i.e. using, congestion critical network elements.
  • the PCRF may identify the elements by an identity (e.g. a radio cell identifier) and/or by a network element IP address information received from the PCEF/BBERF upon an IP-CAN session establishment or modification.
  • the actual storage for the information may be within the PCRF or a PCRF external database.
  • the PCRF aggregates the resource requirements (typically bit rates) of the authorized SDFs of all IP-CAN sessions using a given (congestion critical and thus configured to be under surveillance) network element, e.g.
  • a radio base station or a gateway or a part / direction / route of a gateway may be done by QoS class, for example, guaranteed bit rate (GBR) flows may be aggregated as one group (or even as multiple subgroups), because they need guaranteed bearer resources for known bit rates.
  • GRR guaranteed bit rate
  • a part / direction / route of a gateway may be within the operator's network or from the operator's network gateway towards an external packet data network (PDN).
  • PDN packet data network
  • the PCRF uses network element or part specific/related reference information (e.g. simply a maximum aggregated data rate, possibly related to a QoS class, the element can handle) to compare the aggregated resource requirements of the authorized SDFs with, and to deduce the grade of load in the network element or part, i.e. to deduce how close to congestion and/or to required actions threshold the network element or part is.
  • the network element or part specific/related reference information may be configured at the PCRF or may be available to the PCRF from a PCRF external source.
  • the network part mentioned above may include a plurality of network elements, but also only a part of a network element, such as a part, direction or route of a gateway, as mentioned above.
  • the PCRF may apply already known measures, like preemption based on prioritization, or downgrading QoS (especially bit rate) for sessions which have reported a high usage, or rejecting new requests, or any to-be-specified congestion handling/alleviation measures, to IP-CAN sessions or to SDFs of IP-CAN sessions using the network element or part.
  • measures like preemption based on prioritization, or downgrading QoS (especially bit rate) for sessions which have reported a high usage, or rejecting new requests, or any to-be-specified congestion handling/alleviation measures, to IP-CAN sessions or to SDFs of IP-CAN sessions using the network element or part.
  • Fig. 3 describes the operations when a new IP-CAN session is established and the level of congestion and/or required actions threshold is reached for a given network element:
  • S1 A UE attaches to the network and a default bearer is established for the IP-CAN session.
  • S6 The UE establishes an application session with a counterpart. Related to the session establishment, the AF sends a request with session parameters to the PCRF.
  • PCRF binds the AF session to the IP-CAN session of the UE and checks
  • the PCRF activates congestion management measures, and, depending on the extent of this congestion management measures, the following steps S9 - S13 may not take place.
  • PCRF sends a response to AF.
  • PCRF sends a request with PCC/QoS Rules for the service data flow(s) (SDF) to the PCEF.
  • S10 PCEF establishes a bearer for the new SDF (or modifies an existing bearer).
  • S1 1 UE sends a response to PCEF.
  • PCEF sends a response to PCRF.
  • PCRF updates the IP-CAN session related element/entity records, if there are related requirements in the response message.
  • a master network control element such as a diameter routing agent (DRA) (a kind of master or manager PCRF) that will anyway, as per current 3GPP specifications, be involved in IP-CAN session establishments and related communication between the PCRF clients (e.g. PCEF/BBERF) and the selected PCRF.
  • DRA diameter routing agent
  • the DRA may maintain the loading/congestion grade/status information of the network elements under surveillance and even the network element or part specific/related reference information.
  • the DRA 2 comprises an interface 21 , which provides a connection to a network, a controller 22 which carries out managing the plurality of the network control elements (such as PCRFs) described above, and a memory 23, in which several programs and data for carrying out the functions according to the embodiment are stored.
  • the interface 21 , the controller 22 and the memory 23 may be inter-connected by a suitable connection 24, e.g., a bus or the like.
  • Each PCRF may update the loading/congestion information upon I P-CAN session establishments, modifications and/or terminations in which they are involved themselves, and may correspondingly get updated information caused by other PCRFs, and apply the updated information to avert or handle or alleviate congestion.
  • the PCRF causing the reaching of congestion and/or a required actions threshold may be obliged to activate required measures to handle the situation, in order to avoid a need to signal the situation to other PCRF(s) in the network.
  • a PCC based solution in which impacts on other network elements and signalling between them is minimized to or close to zero.
  • a PCRF keeps track on I P-CAN sessions and especially on related authorized and active service data flows (SDFs) related to, i.e. using, congestion critical network elements.
  • SDFs authorized and active service data flows
  • the PCRF analyses element by element the load situation by monitoring how much bit rate/ bandwidth the PCRF itself has allocated/authorised for the data flows handled by each of the elements.
  • the PCRF utilises the identifiers of the elements (e.g. I D, I P address) and the maximum reference value of each element. In this way, the PCRF can deduce how close to congestion and/or to required actions threshold the network element or part is by keeping track on the total loading status vs. the maximum reference value(s) of each element/entity.
  • the PCRF may apply congestion control or counter- congestion measures to IP-CAN sessions or to SDFs of IP-CAN sessions using the network element.
  • eNB sends congestion information by certain intervals to PCRF and PCRF utilises that info. So, each element to be controlled needs to send the congestion info to PCRF at certain intervals which is hard, burdening and bulky mechanism compared to the above-described embodiments of the invention. According to the embodiments of the present invention, the elements need not to send congestion information to PCRF.
  • a congestion detection and control is achieved which require only limited signalling.
  • a PCRF is a network control element which carries out the function of monitoring sessions in the network.
  • this is only an example. That is, although it is advantageous to provide this function in a PCRF, it is nevertheless possible to provide this function in another network control element separately which performs a policy related control.
  • a DRA is used for managing a plurality of PCRFs.
  • another suitable network control element may be used.
  • the term "network element" is used for describing network nodes such as base stations, gateways and the like.
  • an apparatus which comprises a controller configured to
  • the first aspect may be modified as follows:
  • the controller may be configured to receive a request for the session, and to bind the session to records related to the network element.
  • the controller may be configured to identify the network element based on an identity and/or IP address information of the network element received from a network control element upon establishment or modification of the at least one session.
  • the controller may be configured to monitor a plurality of sessions, and to aggregate resource requirements of all sessions using the network element.
  • the controller may be configured to perform the aggregation based on a quality of service class.
  • the controller may be configured to compare the aggregated resource requirements with reference information, and to deduce load condition on the network element and/or a network part based on the comparison.
  • the controller may be configured to perform congestion control by applying counter- congestion measures when it is determined that a load on the network element and/or the network part exceeds a threshold set based on the reference information.
  • the controller may be configured to monitor sessions of a group of network elements.
  • the network part mentioned above may comprise a group of network elements or a part of the network element, and the reference information may be set for the network part.
  • the part of the network element mentioned above could include a part, direction or route of a gateway.
  • the reference information, and thus the threshold mentioned above may be set for the network part. That is, a single threshold may be applied for a whole group of network elements, for example.
  • the apparatus according to the first aspect and its variations may be a network control element, a policy and charging rules function or a part thereof.
  • an apparatus which comprises
  • a controller configured to manage a plurality of network control elements comprising an apparatus according to the first aspect and its variations.
  • the controller may be configured to perform an exchange of congestion information and/or reference information and/or information regarding a threshold set based on the reference information between the network control elements.
  • a method which comprises
  • the third aspect may be modified as follows:
  • the method may further comprise receiving a request for the session, and binding the session to records related to the network element.
  • the method may further comprise identifying the network element based on an identity and/or IP address information of the network element received from a network control element upon establishment or modification of the at least one session.
  • the method may further comprise monitoring a plurality of sessions, and to aggregate resource requirements of all sessions using the network element.
  • the method may further comprise performing the aggregation based on a quality of service class.
  • the method may further comprise comparing the aggregated resource requirements with reference information, and deducing load condition on the network element and/or a network part based on the comparison.
  • the method may further comprise performing congestion control by applying counter- congestion measures when it is determined that a load on the network element and/or the network part exceeds a threshold set based on the reference information.
  • the method may further comprise monitoring sessions of a group of network elements.
  • the network part may comprise a group of network elements or a part of the network element, and the reference information may be set for the network part.
  • the part of the network element mentioned above could include a part, direction or route of a gateway.
  • the reference information, and thus the threshold mentioned above may be set for the network part. That is, a single threshold may be applied for a whole group of network elements, for example.
  • the method according to the third aspect and its variations may be carried out by a network control element, a policy and charging rules function or a part thereof.
  • a method which comprises
  • the method may further comprise
  • the method according to the fourth aspect and its variations may be carried out by a master network control element, a diameter routing agent or a part thereof.
  • a computer program product which comprises code means for performing a method according to any one of the third and fourth aspects and their variations when run on a processing means or module.
  • the computer program product may be embodied on a computer-readable medium.
  • an apparatus which comprises
  • the sixth aspect may be modified as follows:
  • the apparatus may further comprise means for receiving a request for the session, and binding the session to records related to the network element.
  • the apparatus may further comprise means for identifying the network element based on an identity and/or IP address information of the network element received from a network control element upon establishment or modification of the at least one session.
  • the apparatus may further comprise means for monitoring a plurality of sessions, and to aggregate resource requirements of all sessions using the network element.
  • the apparatus may further comprise means for performing the aggregation based on a quality of service class.
  • the apparatus may further comprise means for comparing the aggregated resource requirements with reference information, and deducing load condition on the network element and/or a network part based on the comparison.
  • the apparatus may further comprise means for performing congestion control by applying counter-congestion measures when it is determined that a load on the network element and/or the network part exceeds a threshold set based on the reference information.
  • the apparatus may further comprise means for monitoring sessions of a group of network elements.
  • an apparatus which comprises
  • the apparatus may further comprise
  • any method step is suitable to be implemented as software or by hardware without changing the idea of the invention in terms of the functionality implemented;
  • CMOS Complementary MOS
  • BiMOS Bipolar MOS
  • BiCMOS Bipolar CMOS
  • ECL emitter Coupled Logic
  • TTL Transistor-Transistor Logic
  • FPGA Field-programmable Gate Arrays
  • CPLD Complex Programmable Logic Device
  • DSP Digital Signal Processor
  • - devices, units or means can be implemented as individual devices, units or means, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device, unit or means is preserved;
  • an 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 an 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
  • a device may be regarded as an apparatus or as an assembly of more than one apparatus, whether functionally in cooperation with each other or functionally

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un appareil qui comprend un contrôleur configuré pour réaliser une fonction de commande de politique, surveiller au moins une session relative à un élément de réseau, et réaliser une commande de congestion sur la base de la ou des sessions surveillées.
PCT/EP2011/060984 2011-06-30 2011-06-30 Détection et commande de congestion Ceased WO2013000516A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/060984 WO2013000516A1 (fr) 2011-06-30 2011-06-30 Détection et commande de congestion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/060984 WO2013000516A1 (fr) 2011-06-30 2011-06-30 Détection et commande de congestion

Publications (1)

Publication Number Publication Date
WO2013000516A1 true WO2013000516A1 (fr) 2013-01-03

Family

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Family Applications (1)

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PCT/EP2011/060984 Ceased WO2013000516A1 (fr) 2011-06-30 2011-06-30 Détection et commande de congestion

Country Status (1)

Country Link
WO (1) WO2013000516A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014135185A1 (fr) * 2013-03-04 2014-09-12 Nokia Solutions And Networks Oy Contrôle de congestion sur le plan usager
WO2014206477A1 (fr) * 2013-06-28 2014-12-31 Nokia Solutions And Networks Oy Gestion de congestion d'un plan utilisateur ran
WO2015090389A1 (fr) * 2013-12-18 2015-06-25 Telefonaktiebolaget L M Ericsson (Publ) Procédés et nœuds pour l'application de politiques et de contrôles d'entrée dans un réseau de communication
CN113079527A (zh) * 2020-01-06 2021-07-06 三星电子株式会社 用于控制无线通信系统中的网络切片数据速率的设备和方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Policy and charging control architecture (3GPP TS 23.203 version 9.5.0 Release 9)", TECHNICAL SPECIFICATION, EUROPEAN TELECOMMUNICATIONS STANDARDS INSTITUTE (ETSI), 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS ; FRANCE, vol. 3GPP SA 2, no. V9.5.0, 1 June 2010 (2010-06-01), XP014047175 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014135185A1 (fr) * 2013-03-04 2014-09-12 Nokia Solutions And Networks Oy Contrôle de congestion sur le plan usager
US9820183B2 (en) 2013-03-04 2017-11-14 Nokia Solutions And Networks Oy User plane congestion control
WO2014206477A1 (fr) * 2013-06-28 2014-12-31 Nokia Solutions And Networks Oy Gestion de congestion d'un plan utilisateur ran
WO2015090389A1 (fr) * 2013-12-18 2015-06-25 Telefonaktiebolaget L M Ericsson (Publ) Procédés et nœuds pour l'application de politiques et de contrôles d'entrée dans un réseau de communication
CN113079527A (zh) * 2020-01-06 2021-07-06 三星电子株式会社 用于控制无线通信系统中的网络切片数据速率的设备和方法
EP3846533A1 (fr) * 2020-01-06 2021-07-07 Samsung Electronics Co., Ltd. Appareil et procédé de contrôle de débit de données de tranche de réseau dans un système de communication sans fil
EP4255034A3 (fr) * 2020-01-06 2023-11-08 Samsung Electronics Co., Ltd. Appareil et procédé de contrôle de débit de données de tranche de réseau dans un système de communication sans fil
US11910295B2 (en) 2020-01-06 2024-02-20 Samsung Electronics Co., Ltd. Apparatus and method for controlling network slice data rate in wireless communication system

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