WO2011081583A1 - Procédé et aménagement pour établir la priorité d'alarmes sur la base de l'impact estimé du service dans un réseau de communication - Google Patents

Procédé et aménagement pour établir la priorité d'alarmes sur la base de l'impact estimé du service dans un réseau de communication Download PDF

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Publication number
WO2011081583A1
WO2011081583A1 PCT/SE2009/051514 SE2009051514W WO2011081583A1 WO 2011081583 A1 WO2011081583 A1 WO 2011081583A1 SE 2009051514 W SE2009051514 W SE 2009051514W WO 2011081583 A1 WO2011081583 A1 WO 2011081583A1
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WO
WIPO (PCT)
Prior art keywords
communication network
network elements
network element
negative impact
served
Prior art date
Application number
PCT/SE2009/051514
Other languages
English (en)
Inventor
Johan Moe
Harald Kallin
Pål FRENGER
Per Sundblad
Original Assignee
Telefonaktiebolaget L M Ericsson (Publ)
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 Telefonaktiebolaget L M Ericsson (Publ) filed Critical Telefonaktiebolaget L M Ericsson (Publ)
Priority to PCT/SE2009/051514 priority Critical patent/WO2011081583A1/fr
Publication of WO2011081583A1 publication Critical patent/WO2011081583A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0681—Configuration of triggering conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition

Definitions

  • the present invention relates to a method and arrangement in a communication network system and, more particular, to an arrangement allowing for managing alarm priority settings as well as a method for such management.
  • a wireless telecommunication network may contain several ten thousands of network elements.
  • the large number of network elements is due to the number of base stations required to cover a geographical area.
  • the number of alarms received in a network management centre can be humongous.
  • one objective of the present invention is to provide an improved method and arrangement for managing an alarm priority setting when a communication network element is malfunctioning in a communication network system comprising a multitude of communication network elements.
  • this objective is achieved through a method as defined in the characterizing portion of claim 1 , which specifies that the alarm priority settings are managed by a method comprising the steps of: estimating an expected negative impact during a pre-determined time period; and, setting said alarm priority according to said expected negative impact.
  • this objective is achieved through an arrangement as defined in the characterizing portion of claim 6, which specifies that the alarm priority settings are managed by the arrangement comprising a processing unit arranged to: estimate an expected negative impact during a pre-determined time period; and, set said alarm priority according to said expected negative impact.
  • Figure 1 shows an example of a communication network architecture
  • Figure 2 is a graph of a possible traffic distribution over a day in a cell
  • Figure 3 is a graph of a traffic distribution and traffic loss in the case of an alarm
  • Figure 4 illustrates the current traffic levels compared to historical values for the malfunctioning network element
  • Figure 5 is a graph showing a forecast of an overload situation
  • FIG. 6 is a flowchart over embodiments of the present inventive method
  • FIG. 7 is a simplified block diagram showing embodiments of the present invention.
  • FIG. 1 depicts a communication system including a radio access network (RAN), such as the UMTS terrestrial radio access network (UTRAN) architecture, comprising at least one radio base station (RBS) (eNode B or Node B) 15 (two are shown in fig. 1 ) connected to one or more radio network controllers (RNCs) 10.
  • the RAN is connected to a core network (CN) 12.
  • the RAN and the CN 12 provide communication and control for a plurality of user equipments (UE) 18 that each uses downlink (DL) channels 16 and uplink (UL) channels 17.
  • DL downlink
  • UL uplink
  • Only one uplink channel is denoted 17 and downlink channel denoted 16.
  • the RBS 15 transmits data to each user equipment 18 at a respective power level.
  • the user equipments 18 transmit data to the RBS 15 at respective power levels.
  • the communication system is herein described as a WCDMA communication system.
  • the skilled person realizes that the inventive method and arrangement works very well on other
  • the user equipments 18 may be mobile stations such as mobile telephones ("cellular" telephones) and laptop computers with mobile termination and thus may be, for example, portable, pocket, handheld, computer-included, or car-mounted mobile devices which communicate voice and/or data with the RAN.
  • mobile telephones cellular telephones
  • laptop computers with mobile termination and thus may be, for example, portable, pocket, handheld, computer-included, or car-mounted mobile devices which communicate voice and/or data with the RAN.
  • Embodiments of the present invention comprise in general a method for setting alarm priorities, using historical data to make an estimate of the expected traffic loss when a network element malfunctions. In order to get a better estimate of the traffic loss, the surrounding network elements' ability to serve the affected traffic is also considered. This knowledge is used when resolving which fault indications (alarm/KPI threshold breach etc) have a higher priority.
  • the operator is assumed to run at least one, but possibly two or more, radio technologies in parallel; for example WCDMA in combination with LTE.
  • the graph in figure 2 shows a possible traffic distribution over a day for a cell.
  • traffic may be the number of:
  • a good length for the traffic characteristics is to have it for one hour granularity for each day of the week.
  • the traffic situation is something an experienced operator considers when judging alarms and this is normally based on a long-earned knowledge.
  • the traffic may be picked up by other cells possible belonging to other technologies. This means that although the shopping mall is highly crowded, the traffic may be served to an acceptable level. This is knowledge that is hard to gain for an operator.
  • an arrangement prioritizes - assigns severity levels - alarms by estimating the traffic impact from a faulty network element and is suggested to include:
  • a network element in a radio network measures the coverage overlap from surrounding network elements (cells) and estimate what traffic can be supported by other cells.
  • voice calls may be handled without a problem, but no video calls are possible.
  • data traffic is possible but with a lower data rate.
  • the difference in service level may be due to lack of the necessary capabilities in the remaining network elements, or because of overload in the network elements.
  • the priority, alarm severity is derived from the time of day and day of week, but not in the way that the severity is directly from the current time; for example 1 ⁇ ⁇ f ⁇
  • a damage estimate is calculated from a given time - 1 - which may be a) the time of the alarm notification or b) the current time; and some time forward - At - for example 6 hours.
  • a maximum or average value for a time-to- repair target is set for different cells. In big cities it could be set to 6h, in smaller cities to 8h and on the countryside it could be set to 24h.
  • the time-to-repair target value is then used as At when computing the severity level.
  • an estimate of the lost traffic is done by comparing the traffic handled in the region.
  • the example in figure 4 illustrates a case where a GSM or LTE cell has malfunctioned.
  • the right hand side bars in figure 4 indicate the extra traffic the remaining network elements carry, compared to the normal traffic levels. This analysis indicates a net traffic impact (loss) of only 2 % of the network element's traffic.
  • the bars in figure 4 indicate the current traffic levels compared to historical values for the faulty network element. As traffic changes over time it is also relevant to forecast if the situation gets worse.
  • the graph in figure 5 shows a forecasting of the overload situation.
  • a i arm the traffic increased significantly in the remaining network elements to levels much above the normal level.
  • the estimate is that the traffic level will exceed the capacity of the remaining network element(s).
  • the traffic impact is calculated and used for setting the severity of the alarm. In this case, it is also possible to use this information to provide a maximum time-to-repair; the traffic may stay at an acceptable level for some time, but the network element should be repaired before the system experience the overload, where the end user impact will be much more evident.
  • the procedure comprises the steps of:
  • step 61 - estimating how much service handled by said malfunctioning communication network element that may be served by surrounding communication network elements
  • step 62 - estimating an expected negative impact, i.e. traffic outage, during a p re-determined time period based on said estimated service served by surrounding communication network elements (step 62);
  • said step of estimating how much service that may be served by surrounding communication network element comprises the step of measuring a coverage overlap from surrounding communication network elements.
  • said step of estimating said expected negative impact, or traffic outage comprises the step of comparing said estimated service served by surrounding communication network elements with service normally handled by said malfunctioning communication network element.
  • said pre-determined time period is a time-to-repair target time.
  • Figure 7 is a block diagram showing a user equipment 18 and a communication network element 15, such as Node B, of managing an alarm priority setting when a communication 15 network element is malfunctioning in a communication network system comprising a
  • the block diagram further comprises a second communication network element 74 such as a radio network controller (RNC), an operations support system (OSS) or a network management system (NMS).
  • RNC radio network controller
  • OSS operations support system
  • NMS network management system
  • the Node B 15 comprises a transmitting unit 72 including a radio transmitter.
  • the Node B 15 further comprises a receiving unit 71 including a receiver.
  • the transmitter 72 is transmitting data to a receiver 77 of the user equipment 18 over a radio interface on the downlink channel 16.
  • the receiver 71 is receiving data from the user equipment 18 on the uplink channel 17.
  • Node B 15 optionally further comprises a processing unit 73 arranged
  • the user equipment 18 comprises a transmitting unit 76 including a radio transmitter.
  • the radio transmitter 76 is arranged to transmit data packets to the receiver 71 of the Node B 35 15 over the radio interface on the uplink channel 17.
  • the UE 18 further comprises a receiving unit 77 including a receiver.
  • the receiver 77 is arranged to receive data packets transmitted from the transmitter 72 of the Node B 15 on the downlink channel 16.
  • the second communication network element 74 optionally comprises a processing unit 73 arranged to
  • the processing unit is further arranged to measure a coverage overlap from surrounding communication network elements when estimating how much service that may be served by surrounding communication network element.
  • the processing unit is further arranged to compare said estimated service served by surrounding communication network elements with traffic normally handled by said malfunctioning communication network element when estimating said expected negative impact, or traffic outage.
  • the pre-determined time period is a time-to-repair target time.

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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 concerne un procédé et un aménagement servant à gérer l'établissement de la priorité d'alarmes en cas de dysfonctionnement d'un élément de réseau dans un système de réseau de communication comprenant une multitude d'éléments de réseau de communication. D'abord, un impact négatif attendu pendant une durée prédéterminée est estimé. Ensuite, la priorité d'alarmes est établie sur la base de l'impact négatif estimé.
PCT/SE2009/051514 2009-12-30 2009-12-30 Procédé et aménagement pour établir la priorité d'alarmes sur la base de l'impact estimé du service dans un réseau de communication WO2011081583A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SE2009/051514 WO2011081583A1 (fr) 2009-12-30 2009-12-30 Procédé et aménagement pour établir la priorité d'alarmes sur la base de l'impact estimé du service dans un réseau de communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2009/051514 WO2011081583A1 (fr) 2009-12-30 2009-12-30 Procédé et aménagement pour établir la priorité d'alarmes sur la base de l'impact estimé du service dans un réseau de communication

Publications (1)

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WO2011081583A1 true WO2011081583A1 (fr) 2011-07-07

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PCT/SE2009/051514 WO2011081583A1 (fr) 2009-12-30 2009-12-30 Procédé et aménagement pour établir la priorité d'alarmes sur la base de l'impact estimé du service dans un réseau de communication

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3041283A1 (fr) * 2014-12-30 2016-07-06 Comptel Corporation Prédiction de défaillance dans des réseaux d'accès radio cellulaires et programmation de maintenance préventive
WO2022005347A1 (fr) * 2020-06-30 2022-01-06 Telefonaktiebolaget Lm Ericsson (Publ) Fonctionnement de réseau lors du changement d'environnements physiques

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030142201A1 (en) * 2002-01-31 2003-07-31 Babka James J. Method and system for presenting a video call management console
US20060121906A1 (en) * 2003-03-28 2006-06-08 Paul Stephens Method for determining a coverage area in a cell based communication system
US20070222576A1 (en) * 2006-03-14 2007-09-27 Miller Frank D Method and apparatus for dynamically prioritize network faults based on real-time service degradation

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US20030142201A1 (en) * 2002-01-31 2003-07-31 Babka James J. Method and system for presenting a video call management console
US20060121906A1 (en) * 2003-03-28 2006-06-08 Paul Stephens Method for determining a coverage area in a cell based communication system
US20070222576A1 (en) * 2006-03-14 2007-09-27 Miller Frank D Method and apparatus for dynamically prioritize network faults based on real-time service degradation

Non-Patent Citations (1)

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Title
SAJAL K. DAS ET AL: "A dynamic load balancing strategy for channel assignment using selective borrowing in cellular mobile environment", JOURNAL WIRELESS NETWORKS, vol. 3, no. 5, October 1997 (1997-10-01), pages 333 - 347, XP000728932, Retrieved from the Internet <URL:http://www.springerlink.com/content/h637g155782jqm75/fulltext.pdf> [retrieved on 20100920] *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3041283A1 (fr) * 2014-12-30 2016-07-06 Comptel Corporation Prédiction de défaillance dans des réseaux d'accès radio cellulaires et programmation de maintenance préventive
CN107251485A (zh) * 2014-12-30 2017-10-13 康博泰公司 蜂窝无线电接入网络的提高的服务质量
US10652762B2 (en) 2014-12-30 2020-05-12 Comptel Corporation Enhanced quality of service of a cellular radio access network
WO2022005347A1 (fr) * 2020-06-30 2022-01-06 Telefonaktiebolaget Lm Ericsson (Publ) Fonctionnement de réseau lors du changement d'environnements physiques

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