CN117478173A - Cable modem terminal system, method, medium and computer program product thereof - Google Patents

Cable modem terminal system, method, medium and computer program product thereof Download PDF

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Publication number
CN117478173A
CN117478173A CN202210863725.8A CN202210863725A CN117478173A CN 117478173 A CN117478173 A CN 117478173A CN 202210863725 A CN202210863725 A CN 202210863725A CN 117478173 A CN117478173 A CN 117478173A
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CN
China
Prior art keywords
channel
transmission rate
channels
cable modem
maximum transmission
Prior art date
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Application number
CN202210863725.8A
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Chinese (zh)
Inventor
肖静
陈学波
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Arris Enterprises LLC
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Arris Enterprises LLC
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Filing date
Publication date
Application filed by Arris Enterprises LLC filed Critical Arris Enterprises LLC
Priority to CN202210863725.8A priority Critical patent/CN117478173A/en
Priority to PCT/US2023/027144 priority patent/WO2024019892A1/en
Publication of CN117478173A publication Critical patent/CN117478173A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2801—Broadband local area networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2385—Channel allocation; Bandwidth allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6118—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving cable transmission, e.g. using a cable modem
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex

Abstract

The present disclosure relates to cable modem termination systems, methods, media and computer program products thereof. An electronic device, comprising: a memory having instructions stored thereon; a processor configured to execute instructions stored on the memory to perform at least the following processing for at least one of an uplink channel or a downlink channel, respectively: obtaining a maximum transmission rate of the cable modem; obtaining channel capacity parameters of a cable modem; calculating the minimum number of channels required for obtaining the maximum transmission rate based on the channel capacity parameter to be a first number; and selecting a first number of channels based on the channel selection policy.

Description

Cable modem terminal system, method, medium and computer program product thereof
Technical Field
The present disclosure relates to the field of cable modem termination systems, and in particular to communication between a cable modem and a cable modem termination system.
Background
A Cable Modem (CM) is a device that can access data through a Cable television network. The CM is connected, for example, between a cable jack in a house in the user's home and a network access device (e.g., a computer) and transmits data packets from the network access device (e.g., a Personal Computer (PC), voIP phone, video IP device, etc.) to a cable modem termination system (Cable Modem Termination System, CMTS).
The CMTS receives packets from the CM and sends them to the corresponding network element. In addition, the CMTS obtains data from the corresponding network element that is required by the user's internet surfing device and transmits the data to the CM, which provides the data from the CMTS to the internet surfing device.
In communication between a CMTS and a CM, a communication direction from the CM to the CMTS is referred to as an upstream direction, and a channel for transmitting data in the upstream direction is referred to as an upstream channel (upstream channel); the communication direction from the CMTS to the CM is referred to as the downstream direction, and the channel used to transmit data in the downstream direction is referred to as the downstream channel (downstream channel).
Disclosure of Invention
In the data over cable service interface Specification (Data Over Cable Service Interface Specifications, DOCSIS) 3.0 and DOCSIS3.1 networks, during the initialization process of the cable modem, the CM sends its service flows to the CMTS during the process of registering with the CMTS. For example, the CM transmits its maximum number of supported transmit/receive channels in the cable modem function code. In general, the CMTS will assign the maximum number of transmit/receive channels supported for CM, referred to as full channel assignment. However, the multi-system operator (Multi System Operator, MSO) may limit the transmission rate of end users using broadband services through the CM.
For example, for DOCSIS3.1, during the registration process, the CMTS will allocate thirty-two SC-QAM (Single-Carrier Quadrature Amplitude Modulation, single carrier quadrature amplitude modulation) channels plus two OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiple access) channels as downstream receive channels and eight SC-QAM channels plus two OFDMA channels as upstream transmit channels for the CM. In such a channel allocation manner, the CM can provide a downlink transmission rate exceeding 4Gbps and an uplink transmission rate exceeding 2 Gbps. However, the MSO typically limits the uplink and downlink rates, for example, limits the downlink transmission rate to 100Mbps and the uplink transmission rate to 30Mbps, or limits the downlink transmission rate to 200Mbps and the uplink transmission rate to 50Mbps. Therefore, the channel allocation scheme described above provides a transmission rate far greater than the limited maximum transmission rate.
Due to the limitation of MSO on transmission rate, the above-mentioned full channel allocation method may cause waste of channel resources. Moreover, in order to operate all the channels allocated, the CM needs to consume more power, resulting in power waste.
The present disclosure has been made in view of the above problems, and provides a cable modem terminal system, a method, a medium, and a computer program product thereof, capable of calculating the minimum number of channels required to provide a limited maximum transmission rate according to a transmission rate limit, flexibly allocating a corresponding number of channels as needed, without adopting a full channel allocation manner. Thus, while the CM provides a limited maximum transmission rate, channel resources are saved, unnecessary channel interference is avoided, and the CM is enabled to save power.
According to an aspect of the present disclosure, there is provided a cable modem termination system including: a memory having instructions stored thereon; and a processor configured to execute instructions stored on the memory to perform at least the following processing for at least one of the uplink channel or the downlink channel, respectively: obtaining a maximum transmission rate of the cable modem; obtaining channel capacity parameters of a cable modem; calculating the minimum number of channels required for obtaining the maximum transmission rate based on the channel capacity parameter to be a first number; and selecting a first number of channels based on the channel selection policy.
In some embodiments, the processor is further configured to execute instructions stored on the memory to perform at least the following: the channels are selected based on a channel selection policy such that the number of selected channels is greater than the first number.
In some embodiments, the processor is further configured to execute instructions stored on the memory to perform at least the following: determining a first transmission rate based on the maximum transmission rate, wherein the first transmission rate = a maximum transmission rate, a being a positive number greater than 1; calculating the minimum number of channels required to obtain the first transmission rate to be a second number based on the channel capacity parameter; and selecting a second number of channels based on the channel selection policy.
In some embodiments, the processor is further configured to execute instructions stored on the memory to perform at least the following: obtaining the channel utilization of a cable modem; determining a channel capacity actual utilization value, wherein the channel capacity actual utilization value = channel capacity parameter channel utilization; calculating the minimum number of channels required to obtain the maximum transmission rate based on the channel capacity actual utilization value to be a third number; and selecting a third number of channels based on the channel selection policy.
In some embodiments, the processor is further configured to execute instructions stored on the memory to perform at least the following: the selected channel is adjusted based on the channel utilization.
In some embodiments, channel allocation parameters are defined in a management information base MIB to enable or disable a function of selecting channels according to the calculated number.
According to another aspect of the present disclosure, there is provided a method for a cable modem termination system, the method comprising: obtaining a maximum transmission rate of the cable modem for at least one of the upstream channel or the downstream channel, respectively; obtaining channel capacity parameters of a cable modem; calculating the minimum number of channels required for obtaining the maximum transmission rate based on the channel capacity parameter to be a first number; and selecting a first number of channels based on the channel selection policy.
In some embodiments, the method further comprises: determining a first transmission rate based on the maximum transmission rate, wherein the first transmission rate = a maximum transmission rate, a being a positive number greater than 1; calculating the minimum number of channels required to obtain the first transmission rate to be a second number based on the channel capacity parameter; and selecting a second number of channels based on the channel selection policy.
In some embodiments, the method further comprises: obtaining the channel utilization of a cable modem; determining a channel capacity actual utilization value, wherein the channel capacity actual utilization value = channel capacity parameter channel utilization; calculating the minimum number of channels required to obtain the maximum transmission rate based on the channel capacity actual utilization value to be a third number; and selecting a third number of channels based on the channel selection policy.
According to yet another aspect of the present disclosure, there is provided a non-transitory computer readable medium for use with a processor, the non-transitory computer readable medium having instructions stored thereon, which when executed by the processor, perform at least the following processing for at least one of an upstream channel or a downstream channel: obtaining a maximum transmission rate of the cable modem; obtaining channel capacity parameters of a cable modem; calculating the minimum number of channels required for obtaining the maximum transmission rate based on the channel capacity parameter to be a first number; and selecting a first number of channels based on the channel selection policy.
In some embodiments, the instructions, when executed by the processor, further perform at least the following: the channels are selected based on a channel selection policy such that the number of selected channels is greater than the first number.
In some embodiments, the instructions, when executed by the processor, further perform at least the following: determining a first transmission rate based on the maximum transmission rate, wherein the first transmission rate = a maximum transmission rate, a being a positive number greater than 1; calculating the minimum number of channels required to obtain the first transmission rate to be a second number based on the channel capacity parameter; and selecting a second number of channels based on the channel selection policy.
In some embodiments, the instructions, when executed by the processor, further perform at least the following: obtaining the channel utilization of a cable modem; determining a channel capacity actual utilization value, wherein the channel capacity actual utilization value = channel capacity parameter channel utilization; calculating the minimum number of channels required to obtain the maximum transmission rate based on the channel capacity actual utilization value to be a third number; and selecting a third number of channels based on the channel selection policy.
In some embodiments, channel allocation parameters are defined in a management information base MIB to enable or disable a function of selecting channels according to the calculated number.
According to a further aspect of the present disclosure, there is provided a computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements a method according to an embodiment of the present disclosure.
Drawings
For a better understanding of the present disclosure, and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which:
FIG. 1 illustrates an exemplary configuration of an electronic device in which embodiments according to the present disclosure may be implemented;
fig. 2 shows a schematic diagram of a network including a CMTS and a CM according to an embodiment of the disclosure;
fig. 3 illustrates an exemplary flow chart of a method for a CMTS according to an embodiment of the disclosure;
fig. 4 illustrates an exemplary flow chart of interactions between a CMTS and a CM according to embodiments of the disclosure.
Note that like reference numerals refer to corresponding parts throughout the drawings.
Detailed Description
The following detailed description is made with reference to the accompanying drawings and is provided to assist in a comprehensive understanding of various example embodiments of the disclosure. The following description includes various details to aid in understanding, but these are to be considered merely examples and are not intended to limit the disclosure, which is defined by the appended claims and their equivalents. The words and phrases used in the following description are only intended to provide a clear and consistent understanding of the present disclosure. In addition, descriptions of well-known structures, functions and configurations may be omitted for clarity and conciseness. Those of ordinary skill in the art will recognize that various changes and modifications of the examples described herein can be made without departing from the spirit and scope of the present disclosure.
Fig. 1 illustrates an exemplary configuration block diagram of an electronic device 100 in which embodiments in accordance with the present disclosure may be implemented. For example, the electronic device 100 may be used to implement a CMTS according to embodiments of the present disclosure.
As shown in fig. 1, electronic device 100 includes a processing subsystem 110, a memory subsystem 112, and a networking subsystem 114.
The processing subsystem 110 may be configured to execute instructions stored on the memory subsystem 112 to perform operations performed by the CMTS as described below. Processing subsystem 110 may include one or more devices configured to perform computing operations. For example, processing subsystem 110 may include one or more microprocessors, ASICs, microcontrollers, programmable logic devices, graphics Processor Units (GPUs), and/or one or more Digital Signal Processors (DSPs).
Memory subsystem 112 includes one or more devices for storing data and/or instructions for processing subsystem 110 and networking subsystem 114. For example, memory subsystem 112 may include Dynamic Random Access Memory (DRAM), static Random Access Memory (SRAM), and/or other types of memory (sometimes collectively or individually referred to as "computer-readable storage media").
Additionally, memory subsystem 112 may include mechanisms for controlling access to memory. In some embodiments, memory subsystem 112 includes a memory hierarchy that includes one or more caches coupled to memory in electronic device 100. In some of these embodiments, one or more of the caches are located in the processing subsystem 110.
In some embodiments, memory subsystem 112 is coupled to one or more high-capacity mass storage devices (not shown). For example, the memory subsystem 112 may be coupled to a magnetic or optical drive, a solid state drive, or another type of mass storage device. In these embodiments, the electronic device 100 may use the memory subsystem 112 as a quick access store for frequently used data, while a mass storage device is used to store infrequently used data.
The networking subsystem 114 includes one or more devices configured to couple to and communicate over (i.e., to perform network operations on) a wired and/or wireless network, including: control logic 116, interface circuitry 118, and one or more antennas 120 (or antenna elements). Although fig. 1 includes one or more antennas 120, in some embodiments, electronic device 100 includes one or more nodes, such as node 108, e.g., pads, that may be coupled to one or more antennas 120. Thus, the electronic device 100 may or may not include one or more antennas 120. For example, networking subsystem 114 may include a bluetooth networking system, a cellular networking system (e.g., a 3G/4G/5G network such as UMTS, LTE, etc.), a USB networking system, a networking system based on standards described in IEEE 802.11 (e.g., a Wi-Fi networking system), an ethernet networking system, and/or another networking system.
Within electronic device 100, processing subsystem 110, memory subsystem 112, and networking subsystem 114 are coupled together using bus 128. Bus 128 may include electrical, optical, and/or electro-optical connections that a subsystem may use to communicate commands and data, etc. Although only one bus 128 is shown for clarity, different embodiments may include different numbers or configurations of electrical, optical, and/or electro-optical connections among the subsystems.
In some embodiments, the electronic device 100 includes a display subsystem 126 for displaying information on a display, which may include a display driver and a display, such as a liquid crystal display, a multi-touch screen, or the like.
The electronic device 100 may be (or may be included in) any electronic device having at least one network interface. For example, the electronic device 100 may be (or may be included in): desktop computers, laptop computers, sub-notebooks/netbooks, servers, computers, mainframe computers, cloud-based computers, tablet computers, smart phones, cellular phones, smart watches, wearable devices, consumer electronic devices, portable computing devices, access points, transceivers, controllers, radio nodes, cable modem terminal systems (e.g., cable modem terminal systems of the present disclosure), routers, switches, communication devices, access points, test devices, and/or other electronic devices.
Further, any combination of analog and/or digital circuits may be used to implement the circuits and components in electronic device 100, including: bipolar, PMOS and/or NMOS gates or transistors. Further, the signals in these embodiments may include digital signals having approximately discrete values and/or analog signals having continuous values. In addition, the components and circuits may be single ended or differential, and the power supply may be monopolar or bipolar.
While some of the operations in the foregoing embodiments are implemented in hardware or software, in general, the operations in the foregoing embodiments may be implemented in a variety of configurations and architectures. Thus, some or all of the operations of the foregoing embodiments may be performed in hardware, software, or both. For example, at least some of the operations in the communication technology may be implemented using program instructions 122, an operating system 124 (such as a driver for interface circuitry 118), or in firmware in interface circuitry 118. Alternatively or additionally, at least some of the operations in the communication technology may be implemented in a physical layer, such as hardware in the interface circuit 118.
Referring to fig. 2, a schematic diagram of a network 200 including a CM 210 and a CMTS 220 according to an embodiment of the disclosure is described.
The CM 210 is connected to a CMTS 220, and the CMTS 220 is connected to an external network such as the internet. Typically, the connection between the CMTS and the cable modem is a hard-wired connection using, for example, coaxial cable, fiber optic cable, or a hybrid combination of both. Similarly, CMTS is typically connected to a wide area network such as the internet using a hardwired connection such as fiber optic cable, but in some embodiments satellite connections may be used. Those of ordinary skill in the art will appreciate that while fig. 2 depicts a centralized architecture through which, for example, a front-end CMTS 220 connects to a cable modem, other architectures, such as a distributed access architecture using remote devices, for example, remote Physical Devices (RPDs), remote mac phy devices (RMDs), etc., may also be used in conjunction with the disclosed devices, systems, and methods.
CM 210 may be a DOCSIS-based cable modem and it may contain a cable modem-based multimedia adapter (MTA), gateway, etc. The user devices 230 and 240 may be connected to the CM 210 in a wireless manner or in a wired manner. The CM 210 sends the user data received from the user devices 230 and 240 to the CMTS 220 for transmission to the external network. The CMTS 220 sends data received from the external network destined for the user devices 230 and 240 to the CM 210 for forwarding to the user devices 230 and 240. Although only two user devices are shown in fig. 2, there may be more user devices. Further, although only one CM 210 is shown in fig. 2, CMTS 220 may be connected to multiple cable modems.
In communications between the CMTS and the CM, the direction of communication from the CM to the CMTS is referred to as the upstream direction, as shown, there are upstream channels 260 for transmitting data in the upstream direction, and the direction of communication from the CMTS to the CM is referred to as the downstream direction, as shown, there are downstream channels 250 for transmitting data in the downstream direction. Those skilled in the art will appreciate that although only one upstream channel 260 and one downstream channel 250 are shown in the figures for simplicity of illustration, there may be multiple upstream channels and multiple downstream channels between the CMTS and the CM.
Data transmitted in multiple channels between CMTS 220 and CM 210 may be modulated using OFDMA or SC-QAM.
Although referred to herein as a cable modem, CM 210 may be, for example, a hardware electronic device that may combine the functionality of a cable modem, an access point, and/or a router. The present disclosure also contemplates that CM 210 may include, but is not limited to, the functionality of a Smart Media Device (SMD) or IP/QAM Set Top Box (STB) capable of decoding audio/video content and playing OTT or MSO provided content.
Fig. 3 illustrates a flow chart of a method 300 for an electronic device according to an embodiment of the disclosure. The method 300 may be used, for example, with the electronic device 100 shown in fig. 1.
As shown in fig. 3, in 301, a maximum transmission rate of a cable modem is obtained. As previously mentioned, MSOs may limit the transmission rate of end users using broadband services through cable modems. That is, the maximum transmission rate of the cable modem mentioned here is not the maximum transmission rate that it can achieve on hardware, but the maximum transmission rate that the cable modem can achieve due to the limitation of the MSO. For example, the MSO may limit the downstream transmission rate to 100Mbps and the upstream transmission rate to 30Mbps, or limit the downstream transmission rate to 200Mbps and the upstream transmission rate to 50Mbps.
In 302, channel capacity parameters of a cable modem are obtained. For example, the channel capacity parameter may be the available channel bandwidth. For example, for SC-QAM modulation, the available channel bandwidth for each channel may be 40Mbps.
In 303, a minimum number of channels required to obtain a maximum transmission rate is calculated as a first number based on the channel capacity parameter. In 304, a first number of channels is selected based on a channel selection policy. For example, if the MSO limits the downstream transmission rate to 200Mbps for downstream channels and the available channel bandwidth for each downstream channel is 40Mbps for SC-QAM modulation, the minimum number of channels required to achieve the maximum transmission rate can be calculated to be five, and five SC-QAM downstream channels can be allocated to the downstream channels of the cable based on the channel selection strategy. Those skilled in the art will appreciate that the minimum number of channels required to obtain the maximum transmission rate of the upstream channel may be similarly calculated for the upstream channel and selected for allocation to the cable modems based on the channel selection strategy. In one embodiment of the present disclosure, the minimum number of channels required to achieve the maximum transmission rate may be calculated for only one of the uplink and downlink channels and only the calculated number of channels may be allocated, while still achieving a full channel allocation for the other of the uplink and downlink channels. In another embodiment of the present disclosure, only the minimum number of channels required to achieve the maximum transmission rate may be calculated for the uplink or downlink channels whose transmission rates are limited by the MSO and only the calculated number of channels may be allocated, and a full channel allocation manner may still be achieved for the uplink or downlink channels not limited by the MSO.
In the technical scheme of the present disclosure, channel resources are saved by limiting the number of allocated channels while the maximum transmission rate is realized. Also, for the cable modem, since only a limited number of channels are operated, power is saved and supervision of unnecessary channels is omitted. In addition, since only a limited number of channels are operated, the possibility that the channels are affected by the interference signal is reduced.
In one embodiment of the present disclosure, to ensure that the cable modem has sufficient bandwidth to provide the required transmission rate, the number of channels allocated may be increased to provide redundancy such that the number allocated is greater than the calculated minimum number of channels required to achieve the maximum transmission rate. For example, if the MSO limits the downstream transmission rate to 200Mbps and the available bandwidth for each downstream channel is 40Mbps for SC-QAM modulation, then the minimum number of channels required to achieve the maximum transmission rate can be calculated to be five, then more than five SC-QAM downstream channels, e.g., six SC-QAM downstream channels, can be allocated to the downstream channels of the cable modem based on the channel selection policy to ensure that the cable modem has sufficient bandwidth to provide the required transmission rate.
To ensure that the cable modem has sufficient bandwidth to provide the required transmission rate, the number of channels allocated can be increased to provide redundancy by increasing the maximum transmission rate for computation with appropriate weights. Specifically, in one embodiment of the present disclosure, a first transmission rate is determined based on a maximum transmission rate, where the first transmission rate = a x the maximum transmission rate, a being a positive number greater than 1. For example, if the MSO limits the downstream transmission rate to 200Mbps, a weight constant of 1.2 may be selected, and the first transmission rate=1.2×200Mbps is calculated as 240Mbps. For SC-QAM modulation, the available bandwidth for each downlink channel is 40Mbps, and then the minimum number of channels required to achieve the first transmission rate can be calculated to be six. Then six channels may be selected based on the channel selection policy to allocate six downstream channels for the cable modem.
In order to ensure that the cable modem has sufficient bandwidth to provide the required transmission rate, the minimum number of channels required to achieve the maximum transmission rate may also be calculated by taking into account the channel utilization, using the channel capacity actual utilization value exhibited by the channel utilization, e.g., the channel actual bandwidth. Specifically, in one embodiment of the present disclosure, a channel utilization of a cable modem is obtained, a channel capacity actual utilization value is determined, wherein the channel capacity actual utilization value = channel capacity parameter channel utilization, a minimum number of channels required to obtain a maximum transmission rate is calculated as a third number based on the channel capacity actual utilization value, and a third number of channels is selected based on a channel selection policy. For example, if the MSO limits the downstream transmission rate to 200Mbps, and the available bandwidth of each downstream channel is 40Mbps for SC-QAM modulation, the channel utilization may be 50%, and then the channel capacity actual utilization may be calculated to be 20Mbps. The ten minimum number of channels required to achieve the maximum transmission rate are calculated using the channel capacity actual utilization value. Then ten channels may be selected based on the channel selection policy and ten downstream channels may be allocated to the cable modem.
In one embodiment of the present disclosure, the selected channel may be adjusted based on channel utilization. For example, channels that may be tuned such that channel utilization is low are selectively assigned to cable modems to facilitate data transmission. After channel allocation has been performed, the selected allocated channels may also be dynamically adjusted by monitoring channel utilization, leaving the number of allocated channels unchanged such that channels with low channel utilization are selected for allocation to the cable modems to facilitate data transmission.
In one embodiment of the present disclosure, channel allocation parameters may be defined in a management information base (Management Infomation Base, MIB) to enable or disable a function of selecting channels according to the calculated number. The management information base MIB can specify the variables maintained by the network elements (i.e., information that can be queried and set by the management processes) and give a data structure of a collection of all possible managed objects in the network. In some embodiments, the parameter channelAssignOnserviceFlow may be defined in MIB. When the channelAssignOnserviceFlow is set to "disabled", the CMTS may use prior art channel allocation. When the channelAssignOnserviceFlow is set to "enabled", the CMTS can allocate a limited number of upstream or downstream channels through the steps described above.
Fig. 4 illustrates an exemplary flow chart of interactions between a CMTS and a CM according to embodiments of the disclosure. As shown, during cable modem initialization, the CM first sends maximum transmission rate and channel capacity parameters to the CMTS in the service stream. The CMTS obtains a maximum transmission rate of the cable modem from the service flow and obtains channel capacity parameters of the cable modem, then calculates a minimum number of channels required to obtain the maximum transmission rate as a first number based on the channel capacity parameters, and selects the first number of channels based on a channel selection policy. The CMTS then assigns the selected channel to the CM, causing the CM to operate the selected channel for data transmission.
While some of the operations in the foregoing embodiments are implemented in software, in general, the operations in the foregoing embodiments may be implemented in a variety of configurations and architectures. Thus, some or all of the operations of the foregoing embodiments may be performed in hardware, software, or both. For example, at least some of the operations of the communication techniques may be implemented using program instructions 122 of electronic device 100, operating system 124 (such as a driver for interface circuit 118), or in firmware in interface circuit 118. Alternatively or additionally, at least some of the operations in the communication technology may be implemented in a physical layer, such as hardware in the interface circuitry 118 of the electronic device 100.
The present disclosure may be implemented as any combination of apparatuses, systems, integrated circuits, and computer programs on a non-transitory computer readable medium. One or more processors may be implemented as an Integrated Circuit (IC), application Specific Integrated Circuit (ASIC), or large scale integrated circuit (LSI), system LSI, super LSI, or ultra LSI assembly that performs some or all of the functions described in this disclosure.
The steps of the method according to the present disclosure may also be performed by a plurality of components included in the apparatus, respectively. According to one embodiment, these means may be implemented as computer program modules established for implementing the steps of the method, and the apparatus comprising these means may be a program module architecture for implementing the method by a computer program.
The present disclosure includes the use of software, applications, computer programs, or algorithms. The software, application, computer program or algorithm may be stored on a non-transitory computer readable medium to cause a computer, such as one or more processors, to perform the steps described above and depicted in the drawings. For example, the one or more memories store software or algorithms in executable instructions and the one or more processors may associate a set of instructions to execute the software or algorithms to enhance security in any number of wireless networks in accordance with embodiments described in the present disclosure.
The software and computer programs (which may also be referred to as programs, software applications, components, or code) include machine instructions for a programmable processor, and may be implemented in a high-level procedural, object-oriented, functional, logical, or assembly or machine language. The term "computer-readable medium" refers to any computer program product, apparatus or device, such as magnetic disks, optical disks, solid state memory devices, memory, and Programmable Logic Devices (PLDs), for providing machine instructions or data to a programmable data processor, including computer-readable media that receives machine instructions as a computer-readable signal.
By way of example, computer-readable media can comprise Dynamic Random Access Memory (DRAM), random Access Memory (RAM), read Only Memory (ROM), electrically erasable read only memory (EEPROM), compact disk read only memory (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired computer-readable program code in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer or general purpose or special purpose processor. Disk or disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.
In one or more embodiments, the use of the words "capable," "operable" or "configured" refers to some means, logic, hardware, and/or elements designed to be capable of use in a specified manner. The subject matter of the present disclosure is provided as examples of apparatuses, systems, methods, and programs for performing the features described in the present disclosure. However, other features or variations are contemplated in addition to the features described above. It is contemplated that the implementation of the components and functions of the present disclosure may be accomplished with any emerging technology that may replace any of the above-described implementation technologies.
In addition, the foregoing description provides examples without limiting the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various embodiments may omit, replace, or add various procedures or components as appropriate. For example, features described with respect to certain embodiments may be combined in other embodiments.
Similarly, although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In some cases, multitasking and parallel processing may be advantageous.

Claims (19)

1. A cable modem termination system, the cable modem termination system comprising:
a memory having instructions stored thereon; and
a processor configured to execute instructions stored on the memory to perform at least the following processing for at least one of an uplink channel or a downlink channel, respectively:
obtaining a maximum transmission rate of the cable modem;
obtaining channel capacity parameters of a cable modem;
calculating the minimum number of channels required for obtaining the maximum transmission rate based on the channel capacity parameter to be a first number; and
a first number of channels is selected based on a channel selection policy.
2. The cable modem termination system of claim 1, wherein the processor is further configured to execute instructions stored on the memory to perform at least the following:
the channels are selected based on a channel selection policy such that the number of selected channels is greater than the first number.
3. The cable modem termination system of claim 1, wherein the processor is further configured to execute instructions stored on the memory to perform at least the following:
determining a first transmission rate based on the maximum transmission rate, wherein the first transmission rate = a maximum transmission rate, a being a positive number greater than 1;
calculating the minimum number of channels required to obtain the first transmission rate to be a second number based on the channel capacity parameter; and
a second number of channels is selected based on the channel selection policy.
4. The cable modem termination system of claim 1, wherein the processor is further configured to execute instructions stored on the memory to perform at least the following:
obtaining the channel utilization of a cable modem;
determining a channel capacity actual utilization value, wherein the channel capacity actual utilization value = channel capacity parameter channel utilization;
calculating the minimum number of channels required to obtain the maximum transmission rate based on the channel capacity actual utilization value to be a third number; and
a third number of channels is selected based on the channel selection policy.
5. The cable modem termination system of claim 1, wherein the processor is further configured to execute instructions stored on the memory to perform at least the following:
the selected channel is adjusted based on the channel utilization.
6. The cable modem termination system of claim 1, wherein channel allocation parameters are defined in a management information base MIB to enable or disable a function of selecting channels according to the calculated number.
7. A method for a cable modem termination system, the method comprising, for at least one of an upstream channel or a downstream channel:
obtaining a maximum transmission rate of the cable modem;
obtaining channel capacity parameters of a cable modem;
calculating the minimum number of channels required for obtaining the maximum transmission rate based on the channel capacity parameter to be a first number; and
a first number of channels is selected based on a channel selection policy.
8. The method of claim 7, wherein the method further comprises selecting channels based on a channel selection policy such that a number of selected channels is greater than the first number.
9. The method of claim 7, wherein the method further comprises:
determining a first transmission rate based on the maximum transmission rate, wherein the first transmission rate = a maximum transmission rate, a being a positive number greater than 1;
calculating the minimum number of channels required to obtain the first transmission rate to be a second number based on the channel capacity parameter; and
a second number of channels is selected based on the channel selection policy.
10. The method of claim 7, wherein the method further comprises:
obtaining the channel utilization of a cable modem;
determining a channel capacity actual utilization value, wherein the channel capacity actual utilization value = channel capacity parameter channel utilization;
calculating the minimum number of channels required to obtain the maximum transmission rate based on the channel capacity actual utilization value to be a third number; and
a third number of channels is selected based on the channel selection policy.
11. The method of claim 7, wherein the method further comprises adjusting the selected channel based on channel utilization.
12. The method of claim 7, wherein channel allocation parameters are defined in a management information base MIB to enable or disable a function of selecting channels according to the calculated number.
13. A non-transitory computer readable medium for use with a processor, the non-transitory computer readable medium having instructions stored thereon, which when executed by the processor, perform at least the following processing for at least one of an upstream channel or a downstream channel:
obtaining a maximum transmission rate of the cable modem;
obtaining channel capacity parameters of a cable modem;
calculating the minimum number of channels required for obtaining the maximum transmission rate based on the channel capacity parameter to be a first number; and
a first number of channels is selected based on a channel selection policy.
14. The non-transitory computer readable medium of claim 13, the instructions, when executed by the processor, further perform at least the following:
the channels are selected based on a channel selection policy such that the number of selected channels is greater than the first number.
15. The non-transitory computer readable medium of claim 13, the instructions, when executed by the processor, further perform at least the following:
determining a first transmission rate based on the maximum transmission rate, wherein the first transmission rate = a maximum transmission rate, a being a positive number greater than 1;
calculating the minimum number of channels required to obtain the first transmission rate to be a second number based on the channel capacity parameter; and
a second number of channels is selected based on the channel selection policy.
16. The non-transitory computer readable medium of claim 13, the instructions, when executed by the processor, further perform at least the following:
obtaining the channel utilization of a cable modem;
determining a channel capacity actual utilization value, wherein the channel capacity actual utilization value = channel capacity parameter channel utilization;
calculating the minimum number of channels required to obtain the maximum transmission rate based on the channel capacity actual utilization value to be a third number; and
a third number of channels is selected based on the channel selection policy.
17. The non-transitory computer readable medium of claim 13, the instructions, when executed by the processor, further perform at least the following:
the selected channel is adjusted based on the channel utilization.
18. The non-transitory computer readable medium of claim 13, wherein channel allocation parameters are defined in a management information base MIB to enable or disable a function of selecting channels according to the calculated number.
19. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, realizes the steps of the method according to claims 7 to 12.
CN202210863725.8A 2022-07-21 2022-07-21 Cable modem terminal system, method, medium and computer program product thereof Pending CN117478173A (en)

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PCT/US2023/027144 WO2024019892A1 (en) 2022-07-21 2023-07-07 Cable modem termination system and its method, medium and computer program product

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US6636482B2 (en) * 2001-03-08 2003-10-21 Arris International, Inc. Method and apparatus for controlling traffic loading of different service levels in a cable data system
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