• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    A computer implemented method for performing monitoring and controlling in a cable network, the cable network providing cable connections between a cable modem termination system, CMTS, and cable modems of users. The method includes obtaining (401) Performance metrics from a plurality of measurement points located in the cable network and/or in local networks connected to the cable network through said cable modems; identifying (402) at least one performance metric in a first measurement point not fulfilling a predefined criterion; and setting (405) said first measurement point in enhanced surveillance.
    公开号:FI20195030A1
    申请号:FI20195030
    申请日:2019-01-17
    公开日:2020-07-18
    发明作者:Lauri Isotalo；Antti-Jussi Salmenpohja
    申请人:Elisa Oyj；
    IPC主号:
    专利说明:

    [0001] [0001] The present application generally relates to automated monitoring and control in cable networks.BACKGROUND
    [0002] [0002] This section illustrates useful background information without admission of any technique described herein representative of the state of the art.
    [0003] [0003] A cable network is a system of delivering data, such as television programs or internet connection, to users via radio frequency signals (RF) signals transmitted through coaxial cables, or in optical signals through fiber-optic cables.
    [0004] [0004] There are certain characteristics that are specific to cable networks and may affect operation of the cable networks. The cable networks comprise electromechanical components, such as amplifiers, and over time these may degrade or fail causing transmission errors and/or degraded quality of service. For example, connectors may become loose and/or oxidized. Also nearby rail transportation or construction work, and/or radio devices using similar radio frequencies as the cable network, and/or temperature or humidity changes may affect cable network performance temporarily or permanently.
    [0005] [0005] There is a need to ensure quality of service for users of cable network.SUMMARY
    [0006] [0006] Various aspects of examples of the invention are set out in the claims.
    [0007] [0007] According to a first example aspect of the present invention, there is provided a computer implemented method of monitoring and controlling in a cable network. The cable O network provides cable connections between a cable modem termination system, CMTS, and N cable modems of users. The method comprises O obtaining performance metrics from a plurality of measurement points located in the = cable network and/or in local networks connected to the cable network through said E cable modems; o identifying at least one performance metric in a first measurement point not fulfilling a 2 predefined criterion; and = setting said first measurement point in enhanced surveillance.
    [0009] [0009] In an example embodiment, the method further comprises obtaining updated performance metrics from said first measurement point, identifying said at least one performance metric in said first measurement point still not fulfilling the predefined criterion; and automatically initiating changes in said first measurement point and/or in one or more setting points located between said first measurement point and a cable modem termination system, CMTS.
    [0010] [0010] In an example embodiment, the method further comprises automatically initiating changes in said first measurement point and/or in one or more setting points located between said first measurement point and a cable modem termination system, CMTS; and continuing said enhanced surveillance until said at least one performance metric in said first measurement point fulfills the predefined criterion.
    [0011] [0011] In an example embodiment, the making of automatic initiation of changes comprises automatically generating ticket for manual maintenance action.
    [0012] [0012] In an example embodiment, the identifying is based on comparing the obtained performance metrics to expected values and associated thresholds.
    [0013] [0013] Additionally or alternatively, the identifying is based on comparing the obtained performance metrics to performance metrics obtained from one or more second measurement points located closer to the cable modem termination system, CMTS, than said first measurement point.
    [0014] [0014] Additionally or alternatively, the identifying is based on comparing the obtained performance metrics to performance metrics obtained from one or more second measurement points located in similar location elsewhere in the network.
    [0015] [0015] In an example embodiment, the first measurement point is located in one of O the local networks and the identifying is based on comparing the obtained performance metrics N to performance metrics obtained from a second measurement point located in a cable modem O of said one of the local networks.
    [0018] [0018] In an example embodiment, the measurement points are located in one or more of the following: local multiplexers dividing connections to street cabinets, street cabinets dividing connections to the cable modems of the users; cable amplifiers, cable modems of the users, local devices connected to the cable modems of the users.
    [0019] [0019] In an example embodiment, the performance metrics comprise one or more of the following: signal-to-noise ratio, SNR; power level, modulation errors; bit error rate, BER; transmission speed; transmission delays; jitter; chunk size; pixilation; number of resent video streams.
    [0020] [0020] According to a second example aspect of the present invention, there is provided an apparatus comprising a processor and a memory including computer program code; the memory and the computer program code configured to, with the processor, cause the apparatus to perform the method of the first aspect or any related embodiment.
    [0021] [0021] According to a third example aspect of the present invention, there is provided a computer program comprising computer executable program code which when executed by a processor causes an apparatus to perform the method of the first aspect or any related embodiment.
    [0022] [0022] The computer program of the third aspect may be a computer program product stored on a non-transitory memory medium.
    [0023] [0023] Different non-binding example aspects and embodiments of the present invention have been illustrated in the foregoing. The embodiments in the foregoing are used merely to explain selected aspects or steps that may be utilized in implementations of the present invention. Some embodiments may be presented only with reference to certain example aspects of the invention. It should be appreciated that corresponding embodiments may apply O to other example aspects as well. &
    [0027] [0027] Fig. 3 shows an example local network scenario; 3
    [0028] [0028] Figs. 4 shows a flow diagram illustrating example methods according to certain embodiments; and
    [0029] [0029] Fig. 5 shows an apparatus according to an embodiment.DETAILED DESCRIPTON OF THE DRAWINGS
    [0030] [0030] Example embodiments of the present invention and its potential advantages are understood by referring to Figs. 1 through 5 of the drawings. In this document, like reference signs denote like parts or steps.
    [0031] [0031] In an embodiment of the invention there is provided an automated monitoring and controlling in a cable network. In cable networks all cable modems connected to a certain branch of the cable network see all upstream and downstream traffic in the branch. Therefore, cable modems connected to the cable network generally see a lot of traffic, while only part of the traffic is their own traffic. Conventionally centralized settings have been used in cable networks and some of the settings may not be optimal for some of the users. The service may be available but some users may experience degraded service, for example. In the context of this application a cable network may comprise coaxial cables, fiber-optic cables, hybrid fiber coaxial cables or any combination thereof.
    [0032] [0032] Fig. 1 shows an example scenario according to an embodiment. The scenario shows a cable network 101 comprising a plurality of cable modems and an automated monitoring and control system 111. Performance metrics from measurement points located in the cable network or in local networks connected to the cable network are conveyed to the automated monitoring and control system 111 in phase 11. The performance metrics may concern for example one or more of the following: signal-to-noise ratio, SNR; power level, modulation errors; bit error rate, BER; transmission speed; transmission delays; jitter; chunk size; pixilation; number of resent video streams.
    [0035] [0035] The enhanced surveillance may be continued until performance metrics of the first measurement point fulfill the predefined criterion.
    [0036] [0036] Figs. 2A-2B show example network diagrams according to example embodiments.
    [0037] [0037] Fig. 2A comprises Internet 203, data sources 201 and 202 connected to the Internet 203, a cable modem termination system, CMTS, 204 connected to the Internet 203 and an automated monitoring and control system 111 also connected to the Internet 203. The data sources 201 and 202 may be for example TV or video sources or other servers providing digital services. Connection between the data sources 201, 202 and the CMTS 204 is shown through the Internet 203, but there may be also other connections to data sources from the CMTS 204.
    [0038] [0038] The CMTS 204 is part of cable network that additionally comprises regional hubs 205-207, local multiplexers 208-210, street cabinets 211-213 and connection branches 214-216 connecting to cable modems of users. The CMTS 204 distributes connections to regional hubs 205-207. Regional hub 206 distributes connections local multiplexers 208-210. The local multiplexer 209 distributes connections to street cabinets 211-213. The street cabinets 211-213 distribute connections to cable modems of the users through respective connection branches 214-216. It is to be noted that the shown network structure is only one example and that other implementations are possible. For example, the CMTS 204 may be directly connected to the local multiplexers 208-210 without needing the regional hubs 205-207.
    [0039] [0039] The cable network can be divided into blocks A, B and C, wherein block C provides connections between regional hubs 205-207 connected to the CMTS, 204 and the local multiplexers 208-210; block B provides connections between the local multiplexers 208- 210 and the street cabinets 211-213; and block A provides connections between the street O cabinets 211-213 and the cable modems of the users. N [0040] It is to be noted that the even though Fig. 2A shows connection between the O cable network and the automated monitoring and control system 111 through Internet 203, also = some other connection may be used. There may be for example dedicated direct connection E between the automated monitoring and control system 111 and the CMTS 204 or some other = part of the cable network. > [0041] Fig. 2A shows two example measurement points 230 and 231 according to an = embodiment of the invention. The measurement point 230 is located in the local multiplexer N 209 and the measurement point 231 is located in the street cabinet 213. The automated monitoring and control system 111 obtains performance metrics from the measurement points
    [0042] [0042] Fig. 2B shows the connection branches 214-216 of Fig. 2A in more detail. Fig. 2B shows the street cabinets 211-213 and the connections branches 214-216.
    [0043] [0043] The connection branch 214 comprises cable modems 301-306 depicted by a house icon and cable connections to the cable modems 301-306. Additionally, the connection branch comprises amplifiers 320 and 321 in the connection branch between the connections to cable modems 302 and 303 and between the connections to cable modems 304 and 305. Similarly, the connection branch 215 comprises cable modems 307-312 depicted by a house icon and cable connections to the cable modems 307-312. Additionally, the connection branch comprises amplifiers 322 and 323 in the connection branch between the connections to cable modems 307 and 308 and between the connections to cable modems 310 and 311. The connection branch 216 comprises cable modems 313-318 depicted by a house icon and cable connections to the cable modems 313-318. Additionally, the connection branch comprises amplifiers 324 and 325 in the connection branch between the connections to cable modems 313 and 314 and between the connections to cable modems 316 and 317.
    [0044] [0044] Similarly to Fig. 2A, Fig. 2B shows the example measurement point 231 in the street cabinet 213. Additionally, Fig. 2B shows two more example measurement points 232 and 233 according to an embodiment of the invention. The measurement point 232 is located in the amplifier 325 and the measurement point 233 is located in the cable modem 318. The automated monitoring and control system 111 of Fig. 1 or 2A may obtain performance metrics from the measurement points 232, 233.
    [0045] [0045] Fig. 3 shows an example local network scenario 300 in an end user household environment. The shown scenario comprises a cable modem 318 and local devices 381-385. The cable modem 318 is for example the cable modem 318 of Fig. 2B. The local devices 381- O 385 are connected to a local network (either wired or wireless) and through the local network N to the cable modem 318 that provides connection to the cable network. O [0046] Similarly to Fig. 2B, Fig. 3 shows the example measurement point 233 in the = cable modem 318. Additionally, Fig. 3 shows example measurement points 234-237 according E to an embodiment of the invention in the local devices 384, 381, 383 and 385, respectively. = The measurement point may be associated with a certain application or service running in the > local device. In an embodiment, there may be more than one measurement point in one local 2 device. There may be e.g. separate measurement point for different applications or services. The automated monitoring and control system 111 of Fig. 1 or 2A may obtain performance metrics from the measurement points 233-237. 6
    [0047] [0047] It is to be noted that Figs. 2A and 2B and 3 show only a few example measurement points. Clearly, there may be any number of measurement points. For example, all shown elements may comprise a measurement point that provides performance metrics.
    [0048] [0048] Figs. 4 shows a flow diagram illustrating example methods according to certain embodiments. The method may be implemented in the automated monitoring and control system 111 of Fig. 1 or 2A, for example.
    [0049] [0049] The method of Fig 4 comprises the following phases:
    [0050] [0050] 401: Performance metrics are obtained from a plurality of measurement points located in the cable network and/or in local networks connected to the cable network through cable modems of the cable network. The performance metrics may concern for example one or more of the following: signal-to-noise ratio, SNR; power level, modulation errors, MER; bit error rate, BER; transmission speed; transmission delays; jitter; chunk size; pixilation; number of resent video streams. The performance metrics may be obtained periodically for example once a day, twice a day, once a week, once every hour. The time between consecutive measurements may vary between different measurement points.
    [0051] [0051] 402: A first measurement point not fulfilling a predefined criterion is identified. In an embodiment the performance metrics are compared to predefined threshold values. Alternatively or additionally, the performance metrics are compared to performance metrics obtained from one or more other measurement points. The performance metrics of the first measurement point may for example be compared to performance metrics obtained from one or more second measurement points located closer to a cable modem termination system, CMTS, than said first measurement point. Additionally or alternatively, the performance metrics of the first measurement point may for example be compared to performance metrics obtained from one or more second measurement points located in same local network or one or more second measurement point located in similar location or setting elsewhere in the O network. For example, performance metrics of a cable modem may be compared to N performance metrics of other cable modems, or performance metrics of a street cabinet may be O compared to performance metrics of different street cabinets, or performance metrics of a local = device may be compared to performance metrics of other local devices in the same local E network or to other local devices in other local networks. In yet another embodiment, = performance metrics of one application of a local device are compared to performance metrics 3 of another application in the same or in some other local device. In an embodiment, = performance metrics of a device (e.g. cable modem, network device, local device) are - compared to similar devices elsewhere in the network (e.g. same type of device, device with same configuration, device with same software version etc.). In yet another additional or 7alternative embodiment, machine learning algorithms may be employed for identifying such first measurement point. More detailed examples of the criteria are discussed later in this document.
    [0052] [0052] 405: The first measurement point is set in enhanced surveillance. In enhanced surveillance the period of time between consecutive measurements is shortened from the normal setting. For example, if the measurements are normally taken once a day, in enhanced surveillance the measurements may be taken once every hour or once every two hours. Additionally or alternatively, the time period between measurements in enhanced surveillance may be for example 1 minute, 5 minutes, 10 minutes, 30 minutes, 1 hour, 2 hours, 3 hours, 6 hours, 12 hours, 1 day. Additionally or alternatively, enhanced surveillance may comprise monitoring additional performance metrics in addition to those that are normally monitored. Additionally or alternatively, enhanced surveillance may comprise more intense surveillance in other measurement points in addition to the first measurement point. For example, one or more nearby measurement points may be set to enhanced surveillance as well and/or additional measurement points may be taken into use.
    [0053] [0053] 406: The process waits for a predefined period of time. The time period may depend on the measurement point and the respective settings of the enhanced surveillance.
    [0054] [0054] 407: It is again checked if the predefined criterion is fulfilled. If the criterion is fulfilled the process returns to normal mode in phase 404. In this way random non-recurring problems in performance metrics can be ignored.
    [0055] [0055] 409: If the situation remains and the criterion is not fulfilled, changes are automatically initiated to solve the problem. In this way, the enhanced surveillance is used to confirm that the problem persists, before initiating changes. In this way, real problems can be effectively identified, and further actions can be taken to fix the problems.
    [0056] [0056] In an example embodiment, changes in settings are initiated or a ticket for O manual maintenance action may be generated. Settings may be changed in the first N measurement point and/or in one or more setting points located upstream from the first O measurement point, 1.e. between the first measurement point and a cable modem termination = system, CMTS, of the cable network. The change that is initiated may be for example resetting E the device, changing transmission power, downloading updated software, resetting an = application, changing signal processing parameters. > [0057] Performance metrics from a plurality of different measurement points may be = compared to determine where changes should be made. For example, performance metrics - obtained from a cable modem may be compared to performance metrics obtained from other measurement points located between the cable modem and the CMTS. That is, performance 8metrics obtained from a cable modem may be compared to performance metrics obtained from the street cabinet serving the cable modem and/or to performance metrics obtained from the local multiplexer serving the street cabinet that serves the cable modem and so on. Changes can then be directed to the point where the performance of the cable network degrades. For example, the local multiplexer may be fixed instead of trying to make modifications in the connection branch between the street cabinets and the cable modems.
    [0058] [0058] It is to be noted that setting may be changed in locations comprising a measurement point or in other setting points in the cable network. That is, changes can be made also in locations that are not measured.
    [0059] [0059] The change that is initiated may be identified for example based on predefined rules or by a machine learning algorithm.
    [0060] [0060] 410: Enhanced surveillance is continued, and the process returns to phase 406 or 407.
    [0061] [0061] Use case 1
    [0062] [0062] In the following, an example first use case is discussed. It is to be noted that alternative implementations including only part of the disclosed example are also possible.
    [0067] [0067] The processor 51 may comprise, e.g., a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a graphics processing unit, or the like. Fig. 5 shows one processor 51, but the apparatus 50 may comprise a plurality of processors.
    [0068] [0068] The memory 52 may be for example a non-volatile or a volatile memory, such as a read-only memory (ROM), a programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), a random-access memory (RAM), a flash memory, a data disk, an optical storage, a magnetic storage, a smart card, or the like. The apparatus 50 may comprise a plurality of memories. The memory 52 may be constructed as a part of the apparatus 50 or it may be inserted into a slot, port, or the like of the apparatus 50 by a user.
    [0069] [0069] The communication interface 55 may comprise communication modules that implement data transmission to and from the apparatus 50. The communication modules may comprise, e.g., a wireless or a wired interface module. The wireless interface may comprise such as a WLAN, Bluetooth, infrared (IR), radio frequency identification (RF ID), GSM/GPRS, CDMA, WCDMA, or LTE (Long Term Evolution) radio module. The wired interface may comprise such as Ethernet or universal serial bus (USB), for example. Further the apparatus 50 may comprise a user interface (not shown) for providing interaction with a user of the apparatus. The user interface may comprise a display and a keyboard, for example. The user interaction may be implemented through the communication interface 55, too.
    [0070] [0070] The database 54 may be certain memory area in the memory 52 or alternatively the database 54 may be a separate component or the database 54 may be located in a physically separate database server that is accessed for example through the communication unit 55. The database unit 54 may be a relational (SQL) or a non-relational O (NoSOL) database.
    [0073] [0073] Another technical effect of one or more of the example embodiments disclosed herein is that setting in cable networks can be automatically adjusted according to changing circumstances and problems in the network may be detected and solved before the problems are visible to end users or before the connections fully fail thereby improving user experience. Another technical effect of one or more of the example embodiments disclosed herein is that complex systems with increasing traffic amount can be handled without necessarily needing additional personnel for monitoring tasks.
    [0074] [0074] Another technical effect of one or more of the example embodiments disclosed herein is that risk of human errors may be reduced.
    [0075] [0075] Another technical effect of one or more of the example embodiments disclosed herein is that performance cable network can be used for monitoring of local networks and possibly for solving problems in the local networks.
    [0076] [0076] If desired, the different functions discussed herein may be performed in a different order and/or concurrently with each other. Furthermore, if desired, one or more of the before-described functions may be optional or may be combined.
    [0077] [0077] Although various aspects of the invention are set out in the independent claims, other aspects of the invention comprise other combinations of features from the described embodiments and/or the dependent claims with the features of the independent claims, and not solely the combinations explicitly set out in the claims.
    [0078] [0078] It is also noted herein that while the foregoing describes example embodiments of the invention, these descriptions should not be viewed in a limiting sense. Rather, there are several variations and modifications, which may be made without departing from the scope of the present invention as defined in the appended claims.
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    权利要求:
    Claims (15)
    [1] 1. A computer implemented method for performing monitoring and controlling in a cable network, the cable network providing cable connections between a cable modem termination system, CMTS, (204) and cable modems (301-318) of users, the method comprising obtaining (401) performance metrics from a plurality of measurement points (230-238) located in the cable network and/or in local networks connected to the cable network through said cable modems; identifying (402) at least one performance metric in a first measurement point not fulfilling a predefined criterion; and setting (405) said first measurement point in enhanced surveillance.
    [2] 2. The method of claim 1, further comprising setting at least one additional measurement point in enhanced surveillance, the additional measurement point being located between said first measurement point and a cable modem termination system, CMTS.
    [3] 3. The method of claim 1 or 2, further comprising obtaining updated performance metrics (406, 407) from said first measurement point, identifying said at least one performance metric in said first measurement point still not fulfilling the predefined criterion; and automatically initiating (404) changes in said first measurement point and/or in one or more setting points located between said first measurement point and a cable modem termination system, CMTS.
    [4] 4. The method of claim 1 or 2, further comprising O automatically initiating changes in said first measurement point and/or in one or more N setting points located between said first measurement point and a cable modem termination O system, CMTS; and = continuing (410) said enhanced surveillance until said at least one performance metric E in said first measurement point fulfills the predefined criterion. > D 5. The method of claim 3 or 4, wherein said making of automatic initiation of changes 2 comprises automatically generating ticket for manual maintenance action.
    [5] 16
    [6] 6. The method of any preceding claim, wherein said identifying is based on comparing said obtained performance metrics to expected values and associated thresholds.
    [7] 7. The method of any preceding claim, wherein said identifying is based on comparing said obtained performance metrics to performance metrics obtained from one or more second measurement points located closer to the cable modem termination system, CMTS, than said first measurement point.
    [8] 8. The method of any preceding claim, wherein said identifying is based on comparing said obtained performance metrics to performance metrics obtained from one or more second measurement points located in similar location elsewhere in the network.
    [9] 9. The method of any preceding claim, wherein said first measurement point (235-238) is located in one of the local networks and said identifying is based on comparing said obtained performance metrics to performance metrics obtained from a second measurement point located in a cable modem of said one of the local networks.
    [10] 10. The method of any preceding claim, wherein said first measurement point (235-238) is located in one of the local networks and said identifying is based on comparing said obtained performance metrics to performance metrics obtained from second measurement points located in the same local network.
    [11] 11. The method of any preceding claim, wherein the cable network comprises a block C providing connections between regional hubs (205-207) connected to the cable modem O termination system, CMTS, and local multiplexers (208-210); a block B providing connections N between the local multiplexers (208-210) and street cabinets (211-213); a block A providing O connections between the street cabinets (211-213) and the cable modems (301-318) of the = users, and wherein E there is at least one measurement point (230-233) in each of the blocks A, B and C. > D
    [12] 12. The method of any preceding claim, wherein the measurement points are located in one = or more of the following: local multiplexers (208-210) dividing connections to street cabinets, N street cabinets (211-213) dividing connections to the cable modems of the users; cable 17amplifiers (320-325), cable modems (301-318) of the users, local devices (381-385) connected to the cable modems of the users.
    [13] 13. The method of any preceding claim, wherein the performance metrics comprise one or more of the following: signal-to-noise ratio, SNR; power level; modulation errors; bit error rate, BER; transmission speed; transmission delays; jitter; chunk size; pixilation; number of resent video streams.
    [14] 14. An apparatus (50) comprising a processor (51), and a memory (52) including computer program code; the memory and the computer program code configured to, with the processor, cause the apparatus to perform the method of any one of claims 1-13.
    [15] 15. A computer program comprising computer executable program code (53) which when executed by a processor causes an apparatus to perform the method of any one of claims 1-13. o
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