TW573432B - Provisioning of cable modems with transmission frequency information - Google Patents

Provisioning of cable modems with transmission frequency information Download PDF

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Publication number
TW573432B
TW573432B TW090119784A TW90119784A TW573432B TW 573432 B TW573432 B TW 573432B TW 090119784 A TW090119784 A TW 090119784A TW 90119784 A TW90119784 A TW 90119784A TW 573432 B TW573432 B TW 573432B
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Taiwan
Prior art keywords
cable modem
cable
carrier frequency
frequency
available
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TW090119784A
Other languages
Chinese (zh)
Inventor
Jack M Birnbaum
Robert M Simons
Wayne D Woodruff
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Gen Instrument Corp
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Publication of TW573432B publication Critical patent/TW573432B/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • 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
    • H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
    • 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]
    • H04N21/60—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
    • 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
    • H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
    • H04N21/6168—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving cable transmission, e.g. using a cable modem
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Small-Scale Networks (AREA)

Abstract

A system for provisioning cable modems with frequency information for communication with a cable modem termination system (CMTS) in a cable television plant. In a first embodiment, a virtual channel map of programming services (e.g., television program) is examined to determine which carrier frequencies are unused. These unused frequencies are used to form a table of available CMTS frequencies that is transmitted to the cable modems. The modems then have to only search a subset of all frequencies to locate one having a CMTS identifying signal. Alternatively, the modem can be directly informed of the CMTS frequency, so no searching is required. In a further embodiment, multiple CMTSs are used at the headend, and a traffic monitoring function dynamically adjusts the frequency used by the modems for upstream transmissions to balance the load on the CMTSs.

Description

573432573432

發明背景 本發明涉及那些使用於有線電視設備中，令使用者得以 存取電腦網路（像是網際網路）之纜線數據機，亦涉及使用於 有線電視設備頭端處之纜線數據機終端系統⑷“了”。 纜線數據機是一種裝置，有了它，個人電腦（p c)就可利 用有線電視網路，以較電話數據機快甚多之資料速率來傳 送及接收資料。纜線數據機除了可提供出較快的資料速率 之外，還可持績地保持連線，毋需以撥接方式建立連線。 此外，纜線數據機可置於視訊轉接器（譬如，終端機或整 合的接收器一解碼器）或個人電腦的外部，亦可整合於其 中。纖線數據機愈來愈普及的原因在於，它們可讓使用者 以非常高的速度存取網際網路。可以使用實施於一單獨個 人電腦或是以電視為基礎的裝置。 典型地，纜線數據機所連接的是電腦中之標準10Base-T 乙太網路卡。 此外，各使用者家中或公司處的各纜線數據機，均有連 接至有線電視公司之同軸電纜或混合光纖同軸電纜 (HFC)，藉以與當地有線電視公司局端（頭端）處之CMTS相 互通信。纜線數據機可以接收CMTS中之資料，亦可傳送資 料至CMTS。此外，較大的纜線系統可以使用多個CMTS， 以處理大量的纜線數據機訊務。_ CMTS與網際網路的連接，一般所使用的是T 1 (每秒 1.544百萬位元）或更快的線路。 _-4- 本纸張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐） 573432BACKGROUND OF THE INVENTION The present invention relates to cable modems used in cable television equipment to allow users to access computer networks such as the Internet, and to cable modems used at the head end of cable television equipment. The end system is "out". A cable modem is a device with which a personal computer (PC) can use a cable television network to transmit and receive data at a much faster data rate than a telephone modem. In addition to providing a faster data rate, the cable modem can keep the connection persistently without the need to establish a connection by dial-up. In addition, the cable modem can be placed outside of a video adapter (such as a terminal or integrated receiver-decoder) or a personal computer, or it can be integrated into it. Fiber modems are becoming more popular because they allow users to access the Internet at very high speeds. Either a personal computer or a TV-based device can be used. Typically, the cable modem is connected to a standard 10Base-T Ethernet card in the computer. In addition, each cable modem in each user's home or company has a coaxial cable or hybrid optical fiber coaxial cable (HFC) connected to the cable company, so as to communicate with the CMTS at the local (cable) end of the local cable company. Communicate with each other. The cable modem can receive data from the CMTS and can also send data to the CMTS. In addition, larger cable systems can use multiple CMTS to handle large amounts of cable modem traffic. _ CMTS is connected to the Internet, usually using T 1 (1.544 million bits per second) or faster. _-4- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 573432

纜線數據資料服務介面規格（D0CSIS)(以及相關的 EuroDOCSIS)已成為纜線數據機主要的標準。有了此標 準，資料得以藉著分時多工（TDM)及視訊資料標準（像是 MPEG)，由CMTS下行傳送至纜線數據機。使用42_85〇百 萬赫之頻寬，以64或256正交調輻（QAM)方式發信。纜線 數據機至CMTS的上行傳送，所使用的則是分時多重接取， 頻見5-42百萬赫’並以正交移項鍵控（qPSK)或i6_qam發 信。 於是，纜線數據機必須有能力決斷出，頭端處之一或多 個CMTS其下行傳送資料時所使用的載波頻率。纜線數據機 一裝设妥當後（譬如，裝設在家中），就須執行此判斷。傳統 上，纜線數據機是以試誤的方式，搜尋範圍在8 〇 _ 8 6 〇百萬 赫之所有頻率，以找出CMTS(稍後該數據機即是要接收由 CMTS處所送出的資料）所發出的確認信號。不過，此獵取 私序會耗費相當多的時間，長達數十分鐘；在這段期間 内’纜線數據機是無法正常供人使用的。 於是’欲提供出一種系統，可快速地將C μ T S傳送資料至 纜線數據機時所使用之載波頻率的相關資訊，提供給纜線 數據機。 此系統應提出一組數目較少的頻率，供纜線數據機搜尋 找出該CMTS確認信號。 或者是，該系統應譬如，利用旁帶訊息將CMTS所使用的 載波頻率直接地告知境線數據機。 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公The cable data service interface specification (D0CSIS) (and related EuroDOCSIS) has become the main standard for cable modems. With this standard, data can be transmitted downstream from the CMTS to the cable modem via Time Division Multiplexing (TDM) and video data standards (such as MPEG). The signal is transmitted in a 64 or 256 quadrature modulation (QAM) mode using a bandwidth of 42-85 million megahertz. The uplink transmission from the cable modem to the CMTS uses time-division multiple access, which is frequently seen at 5-42 MHz 'and is transmitted using orthogonal shift keying (qPSK) or i6_qam. Therefore, the cable modem must be able to determine the carrier frequency used by one or more CMTSs at the headend to transmit data downstream. Once the cable modem is properly installed (for example, at home), this judgment must be performed. Traditionally, the cable modem used a trial and error method to search all frequencies in the range of 80-86 MHz to find the CMTS (the modem will later receive data from the CMTS) ). However, this private sequence will take a considerable amount of time, up to tens of minutes; during this period, the 'cable modem' cannot be used normally by humans. Therefore, it is desired to provide a system that can quickly provide information about the carrier frequency used when transmitting the C μ T S to the cable modem to the cable modem. This system should propose a small number of frequencies for the cable modem to search for the CMTS confirmation signal. Alternatively, the system should, for example, directly use the sideband message to inform the modem of the carrier frequency used by the CMTS. This paper size applies to China National Standard (CNS) A4 (210 X 297 male)

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573432 A7 _B7 1、發明説明（3 )~ "" 尚欲提供出一種系統，可動態地分派CMTS(在多CMTS 的頭端中），為纜線數據機之上行訊務選徑至負擔較輕的 CMTS以加強系統的回應能力。 該系統應相容於DOCSIS及其他的纜線數據機標準。 本發明提供出之系磽，具有上述及其他的優點。 發明摘要573432 A7 _B7 1. Description of the invention (3) ~ " " Still want to provide a system that can dynamically assign CMTS (in the head of multiple CMTS) to route the uplink modem of the cable modem to the burden Lighter CMTS to enhance the responsiveness of the system. The system should be compatible with DOCSIS and other cable modem standards. The system provided by the present invention has the above and other advantages. Summary of the invention

線 本發明涉及那些使用於有線電視設備中，令使用者得以 存取電腦網路（像是網際網路）之纜線教據機，亦涉及纜線數 據機終端系統（CMTS)。 本發明是實際頻道表/圖（VCM/VCT)觀念的延伸。此種 實際頻道表/圖，傳統上可將纜線設備上所規劃之視訊及數 據頻道的相關資訊（譬如，頻道名稱，頻率，頻道型式以及 調變模式）提供給纜線數據機空間。本發明之實際頻率表/圖 則新加一項實際頻道型式，以指明纜線數據機的型式。 操作者以纜線數據機路徑之頻道，建立出該實際頻道 表，此表確認了纜線數據機型式，CMTS是原始名稱，以及 頻率。初始化時，纜線數據機碼會訊問該實際頻道表，，纜線 數據機”之頻道型式或是指定的原始名稱。訊問所傳回的頻 率將是該纜線數據機稍後與該CMTS通信用之頻率。 若境線數據機頻道有所變更，則將使用到實際頻道表更 新機制’通知境線數據機軟體有變更發生，可在需要時自 我更新。 — 使用該實際頻道表結構，該纜線數據機即可透過標準更 新機制，非同步地回應CMTS頻率的變更。 - -6 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公爱) 573432The present invention relates to cable modems used in cable television equipment to allow users to access computer networks (such as the Internet), and also to cable data terminal systems (CMTS). The present invention is an extension of the actual channel table / map (VCM / VCT) concept. This kind of actual channel table / map has traditionally provided information about the video and data channels planned on the cable equipment (such as channel name, frequency, channel type, and modulation mode) to the cable modem space. The actual frequency table / plan of the present invention adds a new actual channel type to indicate the type of cable modem. The operator establishes the actual channel table based on the channels of the cable modem path. This table confirms the cable data model, CMTS is the original name, and frequency. During the initialization, the cable modem code will interrogate the actual channel table, the channel type of the cable modem, or the original name specified. The frequency returned by the interrogation will be the cable modem later communicating with the CMTS. The frequency used. If the channel of the modem line is changed, the actual channel table update mechanism will be used to notify the software of the channel modem that a change has occurred and can be updated when needed. — Using the actual channel table structure, the cable The modem can respond to changes in the CMTS frequency asynchronously through the standard update mechanism.--6-This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 public love) 573432

口在第一具體實施例，將可供使用之cmts頻率列成一表， 提供給纖線數據機以使其需搜尋之載波頻率數目得以降 低。檢驗該有關節目服務之實際頻道表，找出尚未被使用 的頻率即可建立此表。 在第二具體實施例中，直接地將可使用以接收CMTS資料 <特足頻率告知該等纜線數據機。此可免除搜尋之需要。 在第三具體實施例中，監看每個CMTS之上行訊務並動態 地變更上行頻率以將訊務轉移至負擔較輕之CMts上，藉此 平衡頭端處各CMTS之負擔。 呈現各方法及裝置。 圖式之簡要說明 圖1所示為本發明之頭端，其可為纜線數據機提供可供使 用之CMTS傳輸頻率圖，或直接地說明是何頻率。 圖2所示本發明之裝置，可接收CMTS的傳輸頻率資訊。 圖3所不為本發明之頭端，其可動態地平衡各cmts間之 上行纜線數據機訊務負載。 發明之詳細說明 本發明涉及那些使用於有線電視設備中，令使用者得以 存取電腦網路（像是網際網路）之纜線數據機，亦涉及纜線數 據機終端系統（C Μ T S ；)。 圖1所示為本發明之頭端，其1為纜線數據機提供可供使 用之CMTS傳輸頻率圖，或直接地說明是何頻率。 頭端100包含介面11〇，其係用以傳送資料至電腦網路（像 是網際網路1 1 5)或接收來自於電腦網路之資料。譬如，所 本紙張尺度適用中國國家標準(CNS) Α4規格(210 X 297公釐）In the first embodiment, the available cmts frequencies are listed in a table and provided to the fiber modem so that the number of carrier frequencies to be searched can be reduced. Check the actual channel list for the relevant program service to find out the unused frequencies and build this list. In a second embodiment, the cable modems are directly notified of the available frequencies for receiving CMTS data < This eliminates the need for searching. In the third embodiment, the uplink traffic of each CMTS is monitored and the uplink frequency is dynamically changed to transfer the traffic to the less burdened CMts, thereby balancing the burden of each CMTS at the headend. Presents methods and devices. Brief Description of the Drawings Figure 1 shows the headend of the present invention, which can provide a cable modem with a CMTS transmission frequency diagram, or directly explain what frequency it is. The device of the present invention shown in FIG. 2 can receive the transmission frequency information of the CMTS. Figure 3 is not the headend of the present invention, which can dynamically balance the uplink cable modem traffic load between cmts. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to cable modems used in cable television equipment to allow users to access computer networks (such as the Internet), and to cable modem terminal systems (CMTS); ). Figure 1 shows the headend of the present invention. Figure 1 provides a CMTS transmission frequency diagram for the cable modem, or directly illustrates what frequency it is. The headend 100 includes an interface 110, which is used to send data to a computer network (such as the Internet 1 15) or to receive data from a computer network. For example, all paper sizes are in accordance with China National Standard (CNS) A4 (210 X 297 mm)

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573432 A7 B7 發明説明（5 :收的資料可以包括網頁，電子郵件，等等。所 資 料則可包括索求網頁之要求信號，像是—致資敎址器。八 所示1 2 0為C Μ T S之一例，了π J不過，可以提供不止一個的 CMTS。調變器及解調器之庫丨 厚1 3 ϋ把用某一個載波頻率 (fd〇wns“eam)將欲從CMTS處下行傳送至境線數據機之資料 加以調冑，亦能將從下行纜線數據機處接收得* ’典型地 以不同載波頻率（fUpstream)所調變之資料予以解調。 該調變器及解調器之庫130包含多個調變器/以可將節目 服務資料以各種不同的載波頻率加以調變。此資料由處理 功能140提供。舉個例子，該處理可能包含將所接收之壓縮 位元串流予以轉碼之功能，或將已解壓縮之來源 以 編碼之功能。 ' 實際頻道圖解碼功能150可從所接收到的節目服務信號 (此信號可能是MPEG視訊標準之信號）中解碼出實際頻道圖 資料。實際頻道圖或頻道表是一個資料結構，可提供出有 線電視設備上所規劃的有關視訊及數據服務（頻道）之資訊。 主1由f 士 士仓丨1巨口泛鸽冬余阶杜_ 表】 實際頻道圖 ~頻道名稱 載波頻率 頻道负式 _調變模式厂^ HBO f 1 衛星 正交調幅 可使用 η ABC f3 衛星 正交詷Φ& 戲劇 f4 衛星 正叉調ΦΙ» 可使用 f5 一- NBC f6 衛星 正交調植 可使用 f7 CNN f8 衛星 正交調幅 ESPN f9 衛星 _至交調幅 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 裝 訂 573432 A7 B7 五、發明説明U ) CMTS頻率功能160包含一形成表格功能162，其可用該 實際頻道圖做出一可供使用CMTS頻率表，或者，包含一頻 率確立功能164，其可直接地載明可供使用之CMTS頻率。 譬如，功能162可以從表1之實際頻道圖例中，形成表2所示 之可供使用頻率表。 表2-可供使用頻率表573432 A7 B7 Description of the invention (5: The information received can include web pages, e-mails, etc. The information can include the request signals for requesting web pages, such as-to the addresser. 8 shown in 1 2 0 is C An example of Μ TS is π J. However, more than one CMTS can be provided. The library of modulators and demodulators 丨 thick 1 3 ϋ will use a certain carrier frequency (fd0wns "eam) will be going down from the CMTS The data transmitted to the border modem can be tuned and can also be received from the downlink cable modem * 'typically demodulated with data modulated at different carrier frequencies (fUpstream). The modulator and demodulator The library 130 includes multiple modulators / programmers to modulate program service data at various carrier frequencies. This data is provided by a processing function 140. For example, the processing may include receiving compressed bits The function of transcoding the stream, or the function of encoding the decompressed source. 'The actual channel map decoding function 150 can decode the received program service signal (this signal may be a signal of the MPEG video standard) Actual channel map data The actual channel map or channel table is a data structure that can provide information about the video and data services (channels) planned on the cable TV equipment. Main 1 by f Shicang 丨 1 giant mouth pan pigeon winter afterglow DU Table] Actual channel map ~ Channel name Carrier frequency Channel negative type_Modulation mode factory ^ HBO f 1 Satellite quadrature amplitude modulation can use η ABC f3 Satellite quadrature amplitude Φ & Drama f4 Satellite forward modulation ΦΙ »Can use f5 I- NBC f6 satellite orthogonal modulation can use f7 CNN f8 satellite orthogonal amplitude modulation ESPN f9 satellite_to intermodulation amplitude This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 mm) binding 573432 A7 B7 V. Invention Description U) The CMTS frequency function 160 includes a table forming function 162, which can use the actual channel map to make an available CMTS frequency table, or includes a frequency establishment function 164, which can directly indicate the available CMTS Frequency. For example, function 162 can form the available frequency table shown in Table 2 from the actual channel legend in Table 1. Table 2-Available frequency table

該可供使用頻率表指出了頭端處之一或多個CMTS其所可 能使用之下行載波頻率。此資訊會被提供至該調變/解調庫 1 3 0以接受任一可供使用之調變載波頻率的調變，然後透過 該有線設備1 7 0傳送至一或多個的纜線數據機。 該可供使用頻率資訊還可從功能162中提供至CMTS 120 以使該C Μ T S得以挑選傳送其内資料（像是網際網路資料）至 纜線數據機所用之頻率。 該纜線數據機搜尋所接收到之該可供使用頻率表中所載 明之載波頻率，以找出CMTS所使用的頻率。該CMTS之頻 率典型地可藉由一預先指派之CMTS確認信號而確認，此 CMTS確認信號基本上是經認同包任意發信序列。此方法有 好處’這是因為可供使用之頻率數一般來講是該實際頻道 圖中頻率總數的一部分，所以纜線數據機找出該CMTS頻率 本紙張尺度適用中國國家標準(CNS) A4規格(21〇X297公釐) 573432 A7 B7 五、發明説明（7 ) 的速度就可較搜尋實際頻道圖中每一個頻率然後找出該 CMTS確認信號的速度快得多。 或者是，可以使用功能164編碼指明CMTS頻率，然後將 之傳送至該調變/解調庫130以接受任一可供使用之調變載 波頻率（像疋旁W頻率）的調變並透過該有線設備17〇傳送至 一或多個的纜線數據機。特別是，當僅使用一個CMTS時， 此頻率資料可以傳送至網路中所有的纜線數據機。 若使用了多個CMTS，則可利用數據機（或視訊轉接器）之 識別號，將該頻率資料傳送給指定的纜線數據機或數據機 群。譬如，使用已知的視訊轉換定址技術可達到此目的。 功能164可以包含用以儲存該等數據機頻率分派之記憶體。 該特定頻率資訊可以由該功能164提供至該(：]^1^ 12〇以指 示該CMTS應使用何種頻率將其中之資料傳送至纜線數據 機。 右是使用此具體實施例，則該纜線數據機可利用其所接 受到之頻率資訊，立即地找出CMTS所使用的載波頻率。此 方法的好處在於，數據機可不必以試誤方式查核每一個頻 率以”獵取，，該CMTS確認信號。 圖2是本發明用以接收CMTS傳輸頻率資訊之裝置。 裝置200可有多種形式。譬如，一個單一裝置可以包含一 纜線數據機部分205，一視訊/音多接收器部分26〇，以及一 個人電腦（PC)部分265。或者，將這些部分提供於不同的 裝置中或以其他的方式組合。譬如，該纜線數據機部分2〇5 以及視訊/音訊接收器部分260可以組合在一起，而該個人 573432The list of available frequencies indicates the downlink carrier frequency that one or more CMTSs at the head end may use. This information will be provided to the modulation / demodulation library 130 to accept modulation of any available modulation carrier frequency, and then transmitted to one or more cable data through the wired device 170 machine. The available frequency information can also be provided to CMTS 120 from function 162 to enable the MCTS to select the frequency used to transmit its internal data (such as Internet data) to the cable modem. The cable modem searches for the received carrier frequency in the available frequency table to find the frequency used by the CMTS. The frequency of the CMTS can typically be confirmed by a pre-assigned CMTS confirmation signal, which is basically an arbitrary transmission sequence of the acknowledgement packet. This method is beneficial. This is because the number of frequencies available is generally a part of the total number of frequencies in the actual channel map, so the cable modem finds out the CMTS frequency. This paper size applies the Chinese National Standard (CNS) A4 specification. (21 × 297 mm) 573432 A7 B7 5. The speed of the invention (7) can be much faster than searching each frequency in the actual channel map and then finding the CMTS confirmation signal. Alternatively, the CMTS frequency can be specified using the function 164 code, and then transmitted to the modulation / demodulation library 130 to accept the modulation of any available modulation carrier frequency (such as the W side frequency) and pass through the modulation The wired device 170 transmits to one or more cable modems. In particular, when only one CMTS is used, this frequency data can be transmitted to all cable modems in the network. If multiple CMTS are used, the identification number of the modem (or video adapter) can be used to transmit the frequency data to the designated cable modem or modem group. This can be achieved, for example, using known video conversion addressing techniques. Function 164 may include memory to store these modem frequency assignments. The specific frequency information can be provided by the function 164 to the (:) ^ 1 ^ 120 to indicate which frequency the CMTS should use to transmit its data to the cable modem. The right is using this specific embodiment, then the The cable modem can use the frequency information it receives to immediately find the carrier frequency used by the CMTS. The advantage of this method is that the modem does not have to check every frequency in a trial and error manner to "hunt," the CMTS Acknowledgement signal. Fig. 2 is a device for receiving CMTS transmission frequency information according to the present invention. The device 200 may have various forms. For example, a single device may include a cable modem section 205 and a video / audio multiple receiver section 26 , And a personal computer (PC) section 265. Alternatively, these sections may be provided in different devices or combined in other ways. For example, the cable modem section 205 and the video / audio receiver section 260 may be combined in Together, and the individual 573432

%恥部分則依然分離在外。輸出裝置2 8 〇可以與其他部分組 合在一起，或是分離在外。 範例纜線數據機205包括一調變/解調變功能21〇，用以解 凋L由忒纜線機器以下行載波頻率接收自一 C M T s的資料， 以及用以凋變正以上行載波頻率上行傳送至C M T S。 舉個例子，個人電腦265中之瀏覽器270可以透過介面 2 5 0傳送一個要求信號至該調變/解調功能2 1 〇，此功能可 將咸要求#號加以調變並傳送至CMTS。該。“^^接著再將 該要求信號傳送至網際網路。 在一具體實施例中，該調變/解調功能21〇會將圖i中功能 162所提供出之可供使用頻率表加以解調。該表格將會還原 (譬如，被解碼），然後選擇性地儲存在功能22〇。功能22〇 最好是使用非揮發性的記憶體以便所儲存之資訊可在每一 次打開裝置200之電源後就可回復。另外，可以透過該調變 /解凋功能2 10(其針對cMTS資料所使用）或透過該解調功能 262(其針對節目服務資料所使用）將該可供使用頻率表或該 特定的頻率提供至裝置200。 當可供使用頻道表存在時，CMTS確認信號定位功能24〇 可使用它，以搜尋表中載波頻率的方式來尋找c M T s確認信 號。為完成此動作，功能240會令解調器21 〇去測試表中所 有的載波頻率。一旦找到CMTS，認信號，功能24〇會將相 應的載波頻率予以註記並將之儲存在記憶體22〇中。接著， 解調器210仍會諧調至該載有確認信號之CMTS載波頻率， ____ -11- 本紙張尺度適用中國國家標準(CNS) Α4規格(210 X 297公釐）% Shame is still separated. The output device 2 8 can be combined with other parts or separated. The example cable modem 205 includes a modulation / demodulation function 21, which is used to decode data received from a CMT s by the lower carrier frequency of the cable machine, and to alter the positive carrier frequency. Upstream to CMTS. For example, the browser 270 in the personal computer 265 can send a request signal to the modulation / demodulation function 2 10 through the interface 250. This function can modulate and transmit the request ## to the CMTS. That. "^^ The request signal is then transmitted to the Internet. In a specific embodiment, the modulation / demodulation function 21 will demodulate the available frequency table provided by function 162 in FIG. I The form will be restored (eg, decoded) and then selectively stored in function 22. Function 22 is best to use non-volatile memory so that the stored information can be turned on every time the device 200 is powered on. Then you can reply. In addition, the available frequency table or the demodulation function 2 10 (which is used for cMTS data) or the demodulation function 262 (which is used for program service data) The specific frequency is provided to the device 200. When the available channel table exists, the CMTS confirmation signal positioning function 24 can use it to find the c MT s confirmation signal by searching the carrier frequency in the table. To complete this action, The function 240 will cause the demodulator 21 to test all the carrier frequencies in the table. Once the CMTS is found and the signal is recognized, the function 24 will note the corresponding carrier frequency and store it in the memory 22. Then, The demodulator 210 will still tune to the CMTS carrier frequency carrying the confirmation signal. ____ -11- This paper size applies to China National Standard (CNS) Α4 (210 X 297 mm)

裝 訂Binding

線 573432 A7 B7 五、發明説明（9 隨即接收來自於該CMTS之資料，像是來自於網際網路之要 求網頁的信號。 注意’此具體實施例讓數據機205可非常快速地找出該 CMTS載波頻率，毋需測試所有可能的頻率。 在一選擇的具體實施例中，功能210將圖i中功能164所 提供出之特定頻率資訊予以解調。該特定頻率資訊會還原 (譬如，經過解碼後）並選擇性地儲存在功能22〇。該特定頻 率貝訊會為遠解調器2 1 〇所使用，立即地諸調至所指明之 CMTS載波頻率，以接受來自於cmtS之資料。 >王意’此具體實施例讓數據機2〇5立即地找出該CMTS載 波頻率。此具體實施例所要付出的代價是，對於使用了多 個CMTS之頭端而言，其必須說明出哪一個CMTS要傳送至 哪一個纜線數據機或哪一個數據機群，某所使用之頻 率或其所相關之數據機有可能會改變，另外其也有必要譬 如根據某些數據機型式或群體識別號，找出該特定頻率 資訊所要傳送的數據機或數據機群。 若沒有新的頻率表或特定頻率從頭端傳送而來，則解調 器210可以在電源每次開啟後，自動地重諧調至該確認的 CMTS載波頻率。若有新的CMTS載波頻率表從頭端傳送而 來，則將再次地確認該CMTS確認信號，看該相關的載波頻 率是否有改變。或者，調諳至該新的特定頻率。 圖中所示之視訊/音訊接收器26〇乃與該纜線數據機2〇5同 時使用。不過，此非必要。在某些情況中，來自於網際網 路或其他網路之資料可在經由該纜線數據機2 〇 5接收後，連Line 573432 A7 B7 V. Description of the invention (9 The information from the CMTS is then received, such as a signal from the Internet requesting a web page. Note 'This specific embodiment allows the modem 205 to find the CMTS very quickly Carrier frequency, without testing all possible frequencies. In a specific embodiment, function 210 demodulates the specific frequency information provided by function 164 in Figure i. The specific frequency information is restored (for example, decoded) And later) and optionally stored in function 22. This particular frequency will be used by the remote demodulator 2 10, and immediately adjusted to the specified CMTS carrier frequency to accept the data from cmtS. & Gt Wang Yi 'This specific embodiment allows the modem to immediately find the CMTS carrier frequency. The price of this specific embodiment is that for a head that uses multiple CMTSs, it must explain which To which cable modem or modem group a CMTS is to be transmitted, the frequency used or the modem associated with it may change. In addition, it is necessary to Model or group identification number to find the modem or cluster of modems to which the specific frequency information is to be transmitted. If there is no new frequency meter or specific frequency is transmitted from the headend, the demodulator 210 can , Automatically retune to the confirmed CMTS carrier frequency. If a new CMTS carrier frequency table is transmitted from the head end, the CMTS confirmation signal will be confirmed again to see if the relevant carrier frequency has changed. Or, adjust Go to this new specific frequency. The video / audio receiver 26 shown in the figure is used simultaneously with the cable modem 205. However, this is not necessary. In some cases, it comes from the Internet Or other network data can be received through the cable modem

573432 A7 ___B7 五、發明説明（10 ) 同節目服務（譬如，電視節目），一起顯示在輸出裝置28〇 上。在此之外的情況中，使用者僅使用該纜線數據機，不 接收該等節目服務。該視訊/音訊接收器26〇接收來自於頭 端之節目服務，並在解調器264處將之解調。接著，將該資 料予以解碼並執行其他必要的程序，提供信號至該輸出裝 置280(像是電視）。 注意，所示之瀏覽器270也提供信號至輸出裝置28〇。選 擇地，或額外地，該瀏覽器270可以擁有自己專用的輸出， 像是個人電腦監視器。不過，圖中所示之安排適於整合電 視及網際網路系統。 圖3所示之本發明頭端，可在多個CMTS中，動態地平衡 上行纜線數據機之訊務負擔。 相同數字的元件在各圖中均相同。 較大的有線電視網路通常使用多個CMTS(像是例子中之n 個CMTS 120 ’…，122分別擁有網際網路介面1 1 〇，.， 1 1 2)’以處理較大量之纜線數據機及網際網路訊務。譬 如’每一個CMTS均可譬如，透過τ 1線路，與網際網路建 立自屬的連線。 此處，訊務監視器31〇為每一個CMTS 120，…，122監 視它們所接收到的上行纜線數據機資料的量。譬如，可作 為訊務監視器3 1 〇監視所接受到資料的原量的方法是，譬 如使用位元计數器，或使用一些其他量測訊務的方法， 像是測量某一 CMTS所接收到之訊息數，測量某一 CMTS忙 於接收上行訊息之部分時間量或總量，等等。 ---------- -13- _ 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公差：） 573432 A7573432 A7 ___B7 V. Description of the invention (10) It is displayed on the output device 28 with the program service (for example, a TV program). In other cases, the user only uses the cable modem and does not receive such program services. The video / audio receiver 26 receives program services from the head end and demodulates them at a demodulator 264. Then, the data is decoded and other necessary programs are executed to provide a signal to the output device 280 (such as a TV). Note that the browser 270 shown also provides a signal to the output device 28. Alternatively, or in addition, the browser 270 may have its own dedicated output, such as a personal computer monitor. However, the arrangement shown is suitable for integrating TV and Internet systems. The headend of the present invention shown in FIG. 3 can dynamically balance the traffic burden of the uplink cable modem among multiple CMTSs. Elements with the same number are the same in each drawing. Larger cable TV networks usually use multiple CMTS (such as n CMTS 120 '..., 122 in the example have Internet interfaces 1 1 0,., 1 1 2)' to handle a larger number of cables Modems and Internet traffic. For example, 'Each CMTS can establish its own connection to the Internet via the τ 1 line, for example. Here, the traffic monitor 31 monitors the amount of uplink cable modem data received by each CMTS 120, ..., 122. For example, a method that can be used as a traffic monitor 3 1 0 to monitor the amount of received data is, for example, using a bit counter or some other method of measuring traffic, such as measuring the reception of a certain CMTS. The number of messages received measures the amount or amount of time that a certain CMTS is busy receiving uplink messages, and so on. ---------- -13- _ This paper size applies to China National Standard (CNS) A4 specifications (210X297 tolerance :) 573432 A7

為平衡各CMTS的負擔，訊務監視器31〇指示Cmts以不 同的頻率開始接收上行纜線數據機資料（亦即，從庫"Ο中 不同的解調器）。該訊務監視器還可與可供使用/特定頻率功 能320通信，令該等纜線數據機使用不同的上行頻率f此可 直接地以譬如，將所需的頻率分配至該等數據機的方式來 %成。 注意，纜線數據機其所傳送的上行資料的目的C M T S，與 其所接收之下行資料的來源CMTS，兩者可不相同。 該可供使用/特定頻率功能320可合併圖1*CMTS頻率功 能160之功能，譬如，將可供使用或已分派的下行頻率告知 該等 CMTS 120，...，122。 所以，頭端300選擇性地通知該等纜線數據機，更換其進 行上行傳送（像是，傳送D0CSIS資料）時的載波頻率，以使 、纜線設備有能力動態地將該上行訊務選徑至該等相對負擔 較輕之CMTS上，藉以增進系統的回應能力。 於是，可看到，本發明提供出一種系統，可使纜線數據 機有效率地找出下行頻率以將來自於CMTS之資料予以還 原。該等纜線數據機可配備一可供使用CMTS頻率表，以降 低定位CMTS確認信號時所須搜尋的載波頻率數，或者是直 接地告知該等數據機特定的頻率以免除搜尋的動作。 另外，監視每一個CMTS的上行流量並相應動態地變更每 個CMTS所監視之上行頻率，將流量轉移至負擔較輕之 CMTS上’此可平衡頭端中多個cmts的負擔。 雖然本發明已以各種較佳具體實施例說明完畢，但應了 _— _ 14- 本紙張尺度適用中國國家標準(CNS)八4規格(21〇x 297公釐）To balance the burden of each CMTS, the traffic monitor 31 instructs Cmts to start receiving uplink cable modem data at different frequencies (i.e., different demodulator from the library " 0). The traffic monitor can also communicate with the available / specific frequency function 320, so that the cable modems use different uplink frequencies. This can be used, for example, to directly allocate the required frequencies to the modems. Way to %%. Note that the destination of the uplink data sent by the cable modem, C M T S, and the source of the downlink data it receives, CMTS, may be different. The available / specific frequency function 320 may incorporate the functions of the FIG. 1 * CMTS frequency function 160, for example, to inform the CMTS 120, ..., 122 of the available or assigned downlink frequencies. Therefore, the headend 300 selectively informs such cable modems to change the carrier frequency when it transmits uplink data (such as transmitting DOCSIS data), so that the cable equipment can dynamically select the uplink traffic. Go to these relatively lightly burdened CMTS to improve the responsiveness of the system. Thus, it can be seen that the present invention provides a system that enables a cable modem to efficiently find the downstream frequency to restore the data from the CMTS. These cable modems can be equipped with a CMTS frequency meter that can be used to reduce the number of carrier frequencies that must be searched when locating the CMTS confirmation signal, or directly inform the modems of specific frequencies to avoid searching. In addition, monitoring the upstream traffic of each CMTS and dynamically changing the upstream frequency monitored by each CMTS accordingly, transferring the traffic to a lighter CMTS 'can balance the burden of multiple cmts in the headend. Although the present invention has been described in various specific embodiments, it should be ___ 14- This paper size is applicable to China National Standard (CNS) 8-4 specification (21〇x 297 mm)

Claims (1)

573432 六、 第090119784號專利申請案 g 中文申請專利範圍替換本(92年12月p 申請專利範圍 1 . 一種使用於電纜電視網路頭端處之方法，可提供頻率資 訊至該網路中至少一個纜線數據機以允許與該頭端之通 信’其所包含之步,驟： 於頭端處接收頻道圖資訊，其指出已使用於傳送節目 服務，無法供使用之載波頻率，以及至少一個尚未使用 於傳送節目服務之可供使用載波頻率； 從該頭端處提供一信號至該至少一個的纜線數據機， 告知該纜線數據機該至少一個的可供使用載波頻率；以 及 該頭端處規劃至少一個纜線數據機終端系統，其使用 该至少一個的可供使用載波頻率以提供資料至該至少一 個的纜線數據機。 2 ·如申請專利範圍第丨項之方法，其中： 該至少一個的纜線數據機終端系統乃規劃成，於該至 少一個的可供使用載波頻率上傳送一確認信號，以供該 至少一個的纜線數據機檢測。 3 _如申請專利範圍第1項之方法，其中·· 遠k號明確地指出，該至少一個的纜線數據機乃使用 該至少一個的可供使用載波頻率以接收來自於該至少一 個的纜線數據機終端系統之資料。 4 ·如申請專利範圍第1項之方法，其中： 該信號明確地指出’該至少一個的纜線數據機乃使用 該至少一個的可供使用載波頻率以提供資料至該至少一 個的纜線數據機終端系統。 本紙張尺度適用中國國家標準(CNS) A4規格(21〇χ 297公釐)573432 VI. Patent Application No. 090119784 g Chinese Application for Patent Scope Replacement (December 1992 p Application for Patent Scope 1. A method used at the head end of a cable television network, which can provide frequency information to at least one of the network The cable modem to allow communication with the headend 'includes the steps of: receiving, at the headend, channel map information indicating a carrier frequency that has been used to deliver program services and is unavailable, and at least one that has not yet been used Available carrier frequency for transmitting program services; providing a signal from the headend to the at least one cable modem to inform the cable modem of the at least one available carrier frequency; and the headend It plans at least one cable modem terminal system that uses the at least one available carrier frequency to provide data to the at least one cable modem. 2 · The method according to item 丨 of the scope of patent application, wherein: At least one cable modem terminal system is planned to transmit a confirmation letter on the at least one available carrier frequency For the detection of the at least one cable modem. 3 _ As for the method in the scope of the patent application, the far k number clearly states that the at least one cable modem is using the at least one Carrier frequency for receiving data from the at least one cable modem terminal system. 4 · The method of claim 1 in the patent application range, wherein: the signal clearly indicates' the at least one cable modem is Use the at least one available carrier frequency to provide data to the at least one cable modem terminal system. This paper size applies to the Chinese National Standard (CNS) A4 specification (21〇χ 297 mm) •如申請專利I⑽第Η之方法， 於頭端處所接收之該頻 . 於傳送節目Μ1、 。、圖貝訊，指出多個尚未使用 ^目服叙可供使用載波類率；以及 纜線數據機。 用<载波頻率告知該至少一個的 ’·如申請專利範圍第5項之方法，其中： 7㈤的境線數據機適於搜尋該等提供至其之多 欸二供使用載波頻率’以找出該至少-個的纜線數據機 却系▲其所使用以提供資料至該至少一個的纜線數據 機之特定頻率。 '如申請專利範圍第6項之方法，其中： 遠土少-個纖線數據機藉由檢測於其處之缓線數據機 •終端系統確認信號載波，找出該特定頻率。 .♦種私纜電視網路之頭端裝置，可為該網路中至少一個 其 纜線數據機提供頻率資訊，以允許與該頭端之通信， 包含： 於頭端處接收頻道圖資訊之裝置，該頻道圖資訊指出 已使用於傳送節目服務而無法供使用之載波頻率，以及 至少一個尚未使用於傳送節目服務之可供使用載波頻 率； 從該頭端處提供一信號至該至少一個的纜線數據機， 告知該纜線數據機該至少一個的可供使用載波頻率之裝 置；以及 -2 - 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 573432• If the method of applying for the patent I is the first, the frequency received at the headend is used to transmit the program M1. , Tu Beixun, pointed out that a number of unused carrier-class carrier rates are available; and cable modems. The carrier frequency is used to inform the at least one of the "· method as claimed in the scope of patent application No. 5 wherein: 7's borderline modem is suitable for searching for the number of carrier frequencies provided to it to find the carrier frequency ' At least one cable modem is a specific frequency used by it to provide data to the at least one cable modem. 'Such as the method of applying for the scope of patent No.6, in which: far-distance-a fiber-line modem by detecting the slow-line modem located there • The terminal system confirms the signal carrier to find the specific frequency. . ♦ A head-end device for a private cable television network, which can provide frequency information to at least one of its cable modems in the network to allow communication with the head-end, including: receiving channel map information at the head-end Device, the channel map information indicates a carrier frequency that has been used for transmitting program services and is not available, and at least one available carrier frequency that has not been used for transmitting program services; providing a signal from the headend to the at least one A cable modem to inform the cable modem of at least one device capable of using carrier frequency; and -2-this paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) 573432 申請專利範圍 該頭端處規劃至少一個纜線數據機終端系統之裝置， 使用该至少一個的可供使用載波頻率以提供資料至該至 少一個的纜線數據機。 9. 一種用以使至少一個纜線數據機有能力為自己提供電纜 電視網路中之頻率資訊以允許與該網路之頭端通信之方 法，其所包含之步驟： 接收來自於頭端之信號，該信號確認多個尚未使用於 傳送卽目服務之可供使用載波頻率；以及 搜尋該多個提供至其之可供使用載波頻率，以找出該 頭端處之至少一個的纜線數據機終端系統其所使用以提 供資料至該等纜線數據機之特定頻率。 10·如申請專利範圍第9項之方法，其中： 該等可供使用載波頻率乃得自於該頭端所接收之頻道 圖資訊，該頻道圖資訊包含已使用於傳送節目服務而無 法供使用之載波頻率，以及該可供使用之载波頻率。 U·如申請專利範圍第9項之方法，其中： 孩纜線數據機適於使用該特定頻率以提供资 線數據機終端系統。 12. 如申請專利範圍第9項之方法，其中： 該纜線數據機藉由檢測該纜線數據機終端系統之確令 k號，找出該特定頻率。 13. —種纜線數據機裝置，可為自己提供電纜電视網路中之 頻率貧訊’以允許與該網路之頭端通信，其包含， -3- 國國家標準(CNS) A4規格(210X297公資)Scope of patent application At least one cable modem terminal system is planned at the head end, and the at least one available carrier frequency is used to provide data to the at least one cable modem. 9. A method for enabling at least one cable modem to provide itself with frequency information in a cable television network to allow communication with the head-end of the network, comprising the steps of: receiving from the head-end A signal that confirms a plurality of available carrier frequencies that are not yet used in the transmission service; and searches for the plurality of available carrier frequencies provided to it to find at least one cable data at the headend Machine terminal systems are used to provide information to the specific frequencies of these cable modems. 10. The method according to item 9 of the scope of patent application, wherein: the available carrier frequencies are obtained from the channel map information received by the headend, and the channel map information contains the service that has been used to transmit the program service and cannot be used. Carrier frequency, and the available carrier frequency. U. The method according to item 9 of the scope of patent application, wherein: the cable modem is adapted to use the specific frequency to provide a terminal modem system. 12. The method according to item 9 of the patent application scope, wherein: the cable modem finds the specific frequency by detecting the confirmation k number of the cable modem terminal system. 13. —A cable modem device that can provide itself with low frequency information in a cable TV network to allow communication with the head-end of the network, which includes, -3- National National Standard (CNS) A4 specifications (210X297 public funds) 接收來自於頭端信號之裝置，該信號確認多個尚未使 用於傳送節目服務之可供使用載波頻率；以及 搜尋該多個提供至其之可供使用載波頻率，以找出該 頭端處之至少一個的纜線數據機終端系統其所使用以提 供資料至該等纜線數據機之特定頻率之裝置。 14·種用以使至少一個、纟覽線數據機有能力為自己提供電繞 電視網路中之頻率資訊以允許與該網路之頭端通信之方 法，其所包含之步騾： 接收來自於頭端之信號，該信號指明至少一個可供使 用載波頻率，以接收來自於頭端處至少一個纜線數據機 終端系統之資料；其中： 該至少一個的可供使用載波頻率尚未使用於傳送節目 月艮務。 15.如申請專利範圍第1 4項之方法，其中： 該至少一個的可供使用載波頻率乃得自於該頭端所接 收之頻道圖資訊，該頻道圖資訊包含已使用於傳送節目 服務而無法供使用之載波頻率，以及該至少一個的可供 使用之載波頻率。 16·—種纜線數據機裝置，可為自己提供電纜電視網路中之 頻率資訊，以允許與該網路之頭端通信，其包含： 接收來自於頭端信號之裝置，該信號指明至少一個可 供使用載波頻率，以接收來自於頭端處至少一個纜線數 據機終端系統之資料；其中： -4- 本紙張尺㈣^ τ關冢標準_ M規格_ χ撕公爱) 573432 六、申請專利範圍 该至少一個的可供使用載波頻率尚未使用於傳送節目 服務。 17· —種用於電纜電視網路頭端處接收來自於該網路中多個 纜線數據機之上行資料之方法，其所包含之步騾： 於該頭端處提供出多個用以接收該上行資料之纜線數 據機終端系統，其中每一纜線數據機終端系統分派至至 少一個相關之上行載波頻率，以接收該上行資料的一部 分； 監視每一個纜線數據機終端系統所接收之上行資料 量；以及 回應該監視步驟，平衡該各纜線數據機終端系統其上 行資料之負擔。 18.如申請專利範圍第1 7項之方法，其中： 及平衡步驟包含之步驟：將該至少一個的纜線數據機 終端系統所分配到之該至少一個的上行載波頻率予以動 態地變更。 19·如申請專利範圍第17項之方法，其中： 。該平衡步驟包含之步驟：傳送資料至該㈣線數據機 至少其中之一，致令其使用不同的上行載波頻率。 2〇·-種電«視網路之頭端裝置，其接收來自於該網路中 多個纜線數據機之上行資料，包含·· 多個用以接收該上行資料之纜線數據機終端系統，其 ::-纜線數據機終端系統分配給至少一用以接收該上 行資料一部分之相關上行載波頻率； 尺度適用中_家襟準(CNS) A4規格(篇公复了 -5- 573432 8 8 8 8 A BCD 六、申請專利範圍 用以監視每一纜線數據機終端系統所接收之上行資料 量之裝置；以及 用以回應該監視裝置，將該各纜線數據機終端系統之 上行資料負擔予以平衡之裝置。 -6- 本紙張尺度適用中國國家標準(CNS) A4規格(210 x 297公釐)A device that receives a signal from a head-end, the signal confirming a plurality of available carrier frequencies that are not yet used for transmitting program services; and searching for the plurality of available carrier frequencies provided to it to find the head-end At least one cable modem end system is a device used to provide information to the specific frequencies of the cable modems. 14. A method for enabling at least one of the modems to provide themselves with frequency information in an electrically-wound television network to allow communication with the head-end of the network. The method includes the following steps: A signal at the headend that indicates at least one available carrier frequency to receive data from at least one cable modem terminal system at the headend; wherein: the at least one available carrier frequency has not been used for transmission The show month service. 15. The method according to item 14 of the scope of patent application, wherein: the at least one available carrier frequency is obtained from channel map information received by the headend, and the channel map information includes services used for transmitting program services. A carrier frequency that is not available for use, and the at least one carrier frequency that is available for use. 16 · —A cable modem device that can provide itself with frequency information in a cable television network to allow communication with the head end of the network, which includes: a device that receives a signal from the head end, the signal indicating at least A carrier frequency can be used to receive data from at least one cable modem terminal system at the head end; of which: -4- this paper size ㈣ τ Seizuka standard _ M specifications _ χ tear public love) 573432 6 2. The scope of the patent application The at least one available carrier frequency has not been used for transmitting program services. 17 · —A method for receiving uplink data from multiple cable modems in a cable television network at the head end, which includes the following steps: A plurality of receivers are provided at the head end for receiving The cable modem terminal system of the uplink data, wherein each cable modem terminal system is assigned to at least one relevant uplink carrier frequency to receive a portion of the uplink data; monitoring each cable modem terminal system received The amount of uplink data; and respond to the monitoring steps to balance the burden of the uplink data of each cable modem terminal system. 18. The method according to item 17 of the scope of patent application, wherein: and the balancing step includes the step of dynamically changing the at least one uplink carrier frequency allocated to the at least one cable modem terminal system. 19. The method of claim 17 in the scope of patent application, wherein: The balancing step includes the steps of transmitting data to at least one of the radio modems, causing it to use a different uplink carrier frequency. 2〇 · -The head-end device of the video network, which receives uplink data from multiple cable modems in the network, including multiple cable modem terminals for receiving the uplink data System, which ::-The cable modem terminal system allocates to at least one relevant uplink carrier frequency for receiving a part of the uplink data; the standard is applicable _ Jia Jin Zhuan (CNS) A4 specifications (Public reply -5- 573432 8 8 8 8 A BCD VI. Patent application device for monitoring the amount of uplink data received by each cable modem terminal system; and responding to the monitoring device, the uplink of each cable modem terminal system Device for balancing data load. -6- This paper size applies to China National Standard (CNS) A4 (210 x 297 mm).
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WO2004062124A1 (en) 2002-12-17 2004-07-22 Bae Systems Information And Electronic Systems Integration Inc Bandwidth efficient cable network modem
US8705567B2 (en) 2004-12-10 2014-04-22 Broadcom Corporation Upstream channel bonding using legacy maps in a cable communications system
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US5734589A (en) * 1995-01-31 1998-03-31 Bell Atlantic Network Services, Inc. Digital entertainment terminal with channel mapping
US5586121A (en) * 1995-04-21 1996-12-17 Hybrid Networks, Inc. Asymmetric hybrid access system and method

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