CN1351798A - 有线网络上行连接的建立 - Google Patents
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Abstract
一种通讯系统,包括用于传送广播节目和按需服务的宽带和较窄频带的有线网络、以及这两个网络之间的网络适配器。较窄频带的有线网络用于将服务转发到连接在无线通讯网络的收发信机的终端。网络适配器接着连接到无线通讯网络的基站,从终端到宽带有线网络的数据传输被安排经过无线通讯网络的网络适配器进行。连接到宽带网络的网络适配器或网络控制装置被另外安排以产生无线通讯网络的连接建立所需的信号参数,用于传输到多路复用的服务广播的终端。
Description
本发明涉及一种通讯系统,该系统包括用于传送广播节目和按需服务的宽带有线网络和较窄频带的有线网络,以及这两个网络之间的网络适配器,较窄频带的有线网络被安排来传送服务到至少一个终端。
在未来几年里,将引入新型的数字广播网络来传送无线电和电视广播节目。这些网络包括数字音频广播网(DAB)和数字视频广播网(DVB)。DAB和DVB网络还将包括双向、交互式服务,例如能够定购的收费服务或与从网络终端发送的服务相关的响应数据。这种交互式服务包括电子商务、各种游戏和点播电视服务,它们要求终端配备有用于上行传输即传送到网络的装置。所述终端通常具有一个到固定网络如公共交换电话网(PSTN)的有线连接,该网络再连接到DAB或DVB网络。
在这些数字广播网络中可得到的服务也可以经过有线电视网络传送,在这种情况下,与交互式服务相关的上行传输可以安排由家用终端如机顶盒(STB)实现,该机顶盒配备有线电视调制解调器并且连接在有线电视网络和终端之间。借助于STB,可以使用当前的模拟电视和无线电接收机来接收数字广播节目或互联网络服务。该终端也可以被集成到例如使用不同PC接收机卡的计算机。有线电视网络由混合光纤同轴网(HFC)实现,即光纤和同轴电缆的结合,节目服务通常使用例如ATM传递(异步传递方式),经过光纤从网络的前端设备转发到交互式网络适配器(INA)。这些服务还从适配器传递到较小区域的有线电视网络,这些区域包括例如公寓或者一些独立的或半独立的房屋。交互式网络适配器INA的功能适用于下行连接的终端如STB的ATM协议,并且在相反方向上完成适配以允许上行传输经过ATM网络从终端转发到服务供应商。在较小区域的有线电视网络,如公寓的公用天线电缆通常采用树形或星形配置的同轴电缆网络实现。它们非常适合于单向数据传输,尽管在同轴电缆网络中常常产生信号衰减,并且信号也易于受到外部无线电干扰的影响。
上述配置的问题是如何在较小区域的有线电视网络中安排双向的广播。上行传输引入到公寓的共用天线装置增加了网络的噪声和所谓的RF-入口损耗,因此使上行方向的带宽变窄。从网络适配器INA到服务供应商即到前端设备的可利用的连接,经过宽带(典型地是光纤)网络来实现,这里上行传输不会引起类似的问题。因此,本地窄带同轴网络形成了上行传输的瓶颈。
本发明的目的是提供一个可以避免上述问题的通讯系统。
本发明配置的特征在于:
网络适配器可操作地连接到无线通讯网络的基站;
终端可操作地连接到无线通讯网络的收发信机;以及
从终端到宽带有线网络的数据传输被安排经过无线通讯网络的网络适配器来进行。
本发明的基本构思是将宽带和窄带有线网络之间的网络适配器连接到无线基站,窄带网络的终端备有与基站兼容的无线发射机,因此允许无线上行传输在窄带网络上转发。本发明的另一个想法是将建立无线上行连接所需的信号参数在网络适配器上产生,并且从那里经过窄带有线网络转发到终端,多路复用为服务广播节目。根据本发明优选实施例,信号参数也可以在前端设备安排的网络管理装置上产生。本发明另一个优选实施例的想法是终端可以起服务器的作用,用于典型地为家庭环境设计的无线多媒体网络。本发明另一个优选实施例的想法是用于多媒体网络的业务信道的信号参数在网络适配器产生,并且从那里经过窄带有线网络转发到终端,多路复用为服务广播节目。
本发明具有明显的优点。终端和网络适配器之间的无线上行连接允许本地窄带有线电视网络保留单独用于下行传输,使得由上行传输引起的将带宽变窄的干扰不会发生。本发明的另一个优点是因为网络适配器或类似的控制装置用于控制使用的无线电连接,在整个窄带有线电视网络中包括的终端无线电连接可以被集中管理,使得该干扰不会出现。另一个优点是无线上行连接可以例如使用现有技术无线局域网部件来建立。本发明优选实施例还提供的优点是为家庭环境设计的多媒体网络的无线信号参数可以在网络适配器上进行集中管理。另外,这个实施例的优点是它允许多媒体网络例如在办公室或在商品交易会很快地建立起来。
下面参照附图更详细地描述本发明,其中
图1说明用于建立无线上行连接的本发明通讯系统。
图1中,在有线电视网络上可获得的节目服务和其它的服务,从前端设备经过允许在HFC网络进行宽带数据传输的光纤,经过交互式网络适配器INA,转发到较窄频带的本地有线电视网络LCN,LCN典型地由同轴电缆网络实现。提供的下行节目另外经过本地有线电视网络LCN传递到终端,LCN通常以树形或星形配置来实现。根据本发明,本地有线电视网络LCN连接到无线网络基站BTS。基站BTS可以有益的是使用无线局域网技术和宽带(例如2.4GHz)扩频技术的基站。基站BTS可以安排在交互式网络适配器INA,或者它可以有线连接到适配器,在这种情况下,它最好位于本地有线电视网络LCN的中心。本地有线电视网络LCN的终端T1、T2、T3也可以备有无线收发信机W,该收发信机使用如基站相同的传输技术,并且它可以建立到基站BTS的无线连接。终端T的数量自然是非常大的。
根据本发明,信号参数经过有线电视网络LCN分配给终端T1、T2、T3,因此该终端可以使用这些参数和连接到终端的无线收发信机W,以建立到基站BTS的上行连接,并且经过交互式网络适配器INA,另外连接到服务供应商。最好通过识别数据来识别终端T1、T2、T3,根据该识别数据,信号参数可以经过正确的网络适配器到达正确的终端。识别数据最好与用户特定的广播服务中终端标识符数据使用的相同。信号参数的管理可以在交互式网络适配器INA或在前端设备安排的网络控制器NC的中心进行。当信号参数在网络控制器NC产生时,ATM网络最好将网络适配器INA连接到确定参数值的网络控制器NC,然后前端设备将这些值和终端标识符数据多路复用为广播节目服务。终端特定的信号参数值最好可以在前端设备多路复用为DVB标准的广播节目服务,该服务随后还传送到网络适配器INA,该适配器安排广播节目服务和终端标识符以及与该服务相关的信号参数数据为终端理解的多路复用形式,如DVB-C(DVB-Cable)多路复用形式。在扩频技术中,被传送的所有信号在可获得的整个带宽上扩展,并且这些信号最好借助于不同的代码相互分开。如果无线上行广播节目使用扩频技术来传送,信号参数至少包括使用的信号信道、以及将使用的业务信道相互分开的最好的代码。
相对于服务不同的本地有线电视网络LCN的基站,必须提供足够的重新传输距离。相互位置上足够分开的低容量基站BTS最好可以使用相同的频率块。经过有线电视网络LCN,终端至少接收信号信道代码以及可能的业务量信道代码。终端可以使用信号信道代码用于配置基站BTS。如果若干个基站在物理位置上相互接近,则必须分配给它们不同的频率块。
终端用户经过HFC网络接收如上所述的交互式服务,用于每个终端的信号参数最好在网络适配器INA或在前端设备被多路复用为服务广播节目,以提供用于无线上行连接。接收的交互式服务允许例如响应数据从终端发送回服务供应商。当终端用户希望发送上行消息时,建立从终端装置的收发信机W到基站BTS的无线连接。使用经过有线电视网络LCN传送的信号信道代码建立该连接,这些代码允许终端建立到基站BTS的信号连接。信号连接最好用于将转发用户数据所需的业务量信道代码传送给终端,并且,在完成用于业务量信道的连接建立处理之后,将业务量信道分配给终端用于传送上行消息。另一方面,业务量信道代码也可以多路复用为服务广播节目,并且从网络适配器INA经过有线电视网络LCN传送到终端,它加速了终端和基站BTS之间的连接建立。
终端可以例如是经过机顶盒连接到有线电视网络的电视或无线电终端,如图1所示的终端T1。在这种情况下,无线收发信机W如IEEE标准802.11的WLAN卡被集成到机顶盒。该终端也可以是包括例如WLAN卡和允许DAB接收的接口卡的个人计算机PC(终端T2)。终端和基站之间的无线数据传输自然通过使用任何短距离无线电网络解决方案来实现。
根据本发明的优选实施例,用于分配信号参数的上面的方法可以用于例如家庭环境的解决方案,这里不同的通讯和视听服务被集成到同一个典型的无线通讯网络。这种类型的解决方案称为多媒体家庭平台(MHP)。根据DVB标准化,对于MHP已经设计了参考模型,该MHP描述了多媒体终端和不同的辅助装置如打印机和大容量存储设备之间的协作、包括例如使用协议的模型、这些装置之间的接口以及用于接口的编程语言。在MHP模型中,终端T3如上述的机顶盒或备有DAB或DVB接口卡的PC机,典型地用作家庭网络服务器和作为到有线电视网络LCN的网关。MHP的引入还增加了从家庭网络到HFC服务供应商的上行广播的需求,本发明使得能够建立来自MHP网络的终端T3的无线上行连接。
当无线网络用于组合MHP的不同的多媒体终端时,它的外围设备D1、D2、D3和终端T3作为服务器,产生的问题是如何将相互接近的MHP网络发送的无线电频率广播分开。在本发明的优选实施例中,这个问题通过配置MHP网络所需的业务量信道代码来解决,终端和辅助装置之间的反向数据传输也可以采用上述方式,从网络适配器INA经过有线电视网络LCN转发到用作MHP网络服务器的终端。这允许网络适配器INA或网络控制器NC控制连接到同一个本地有线电视网络LCN的所有MHP网络和MHP网络的业务量信道参数。因此它可以确保相互接近的MHP网络使用不同的连接参数和业务量信道,这使得由相邻网络引起的干扰减少。另外,MHP网络可以快速地建立,因为业务量信道代码不需要采用每个装置分开配置的方法。另外,例如在办公室或在商品交易会的临时无线MHP网络的建立明显地变得相当容易。MHP网络的集中控制还允许将连接建立请求经过HFC网络发送到连接在MHP网络的装置。例如,视频访问请求可以经过HFC网络发送到MHP网络的无线监视摄像机,因此,允许将摄像机传送的图片经过视频访问连接来检验。
MHP网络还可以由有线网络,最好是由局域网LAN来实现,在这种情况下,本地网络用做组合MHP的不同多媒体终端的网络,它的辅助装置D1、D2、D3和终端T3作为服务器。因此不必分配无线多媒体网络的业务量信道参数,但使用从终端T3到网络适配器INA的无线连接仍然可以建立上行连接。在这种情况下,终端T3必须配备有允许有线通讯从终端T3经过局域网LAN到MHP的多媒体终端和辅助装置D1、D2、D3的装置。这些装置最好可以包括局域网接口卡LC。
在上面的说明中通过例子和附图描述了本发明,但本发明不限于这里描述的内容。本领域的技术人员很明显地知道本发明也可以用于任何其他类似功能的有线网络。因此,本发明的各种可能的实施例都在附加的权利要求书的范围里。
Claims (11)
1.一种通讯系统,包括用于传送广播节目和按需服务的宽带有线网络和较窄频带的有线网络、以及这两个网络之间的网络适配器,安排较窄频带的有线网络将服务传送给至少一个终端,其特征在于
网络适配器可操作地连接到无线通讯网络的基站;
终端可操作地连接到无线通讯网络的收发信机;以及
从终端到宽带有线网络的数据传输被安排经过无线通讯网络的网络适配器进行。
2.如权利要求1所述的通讯系统,其特征在于
网络适配器被安排来产生无线通讯网络中连接建立所需的信号参数,用于传输到多路复用的服务广播的终端。
3.如权利要求1所述的通讯系统,其特征在于
连接到宽带有线网络的网络控制装置被安排来产生无线通讯中连接建立所需的信号参数,用于经过网络适配器传输到多路复用的服务广播的终端。
4.如权利要求2或3所述的通讯系统,其特征在于
无线通讯网络是一个基于扩频技术的无线局域网,以及
信号参数包括至少一个代码用于确定信号信道。
5.如权利要求4所述的通讯系统,其特征在于
该终端被安排来建立到基站的无线信号连接,用于请求业务量信道,以及
基站被安排来将使用业务量信道所需的代码传送到终端。
6.如前面权利要求中任何一个所述的通讯系统,其特征在于
宽带有线网络、较窄频带的有线网络和这两个网络之间的网络适配器形成HFC网络(混合光纤同轴网),宽带网络是光纤网络,而窄带网络是同轴电缆网络。
7.如前面权利要求中任何一个所述的通讯系统,其特征在于
该终端包括连接到电视或无线电接收机的机顶盒。
8.如权利要求1到6中任何一个所述的通讯系统,其特征在于
该终端包括一个连接到计算机的音频或视频接口卡。
9.如前面权利要求中任何一个所述的通讯系统,其特征在于
该终端被安排用作无线多媒体网络如MHP网络的服务器。
网络适配器被安排以产生使用无线多媒体网络的业务量信道所需的代码,用于传输到多路复用的服务广播的终端。
10.如权利要求9所述的通讯系统,其特征在于
该终端被安排将使用无线多媒体网络的业务量信道所需的代码转发到多媒体网络的其他装置。
11.如权利要求10所述的通讯系统,其特征在于
该终端被安排将从无线多媒体网络的其他装置访问的消息,经过无线通讯网络的网络适配器传送到宽带有线网络。
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FI991178A FI107107B (fi) | 1999-05-24 | 1999-05-24 | Paluusuuntaisen yhteyden muodostaminen langallisessa verkossa |
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US (1) | US20020056128A1 (zh) |
EP (1) | EP1181822A1 (zh) |
JP (1) | JP2003500947A (zh) |
CN (1) | CN1351798A (zh) |
AU (1) | AU4759700A (zh) |
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WO (1) | WO2000072595A1 (zh) |
Cited By (1)
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CN1599431B (zh) * | 2003-09-16 | 2010-09-15 | Lg电子有限公司 | 支持多显示器的机顶盒 |
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US6495167B2 (en) * | 1997-03-20 | 2002-12-17 | Schering Corporation | Preparation of powder agglomerates |
US7127175B2 (en) * | 2001-06-08 | 2006-10-24 | Nextg Networks | Method and apparatus for multiplexing in a wireless communication infrastructure |
US20020191565A1 (en) * | 2001-06-08 | 2002-12-19 | Sanjay Mani | Methods and systems employing receive diversity in distributed cellular antenna applications |
SE523805C2 (sv) * | 2001-10-24 | 2004-05-18 | Television And Wireless Applic | Metod och system för beställning av TV-tjänster via en mobilterminal |
KR100458253B1 (ko) * | 2001-11-07 | 2004-11-26 | 엘지전자 주식회사 | 홈 네트워크에서의 하우스 코드 생성방법 |
US20040198453A1 (en) * | 2002-09-20 | 2004-10-07 | David Cutrer | Distributed wireless network employing utility poles and optical signal distribution |
DE10332835A1 (de) * | 2003-07-18 | 2004-12-09 | Siemens Ag | Verfahren zum Übermitteln von abrufbaren, zentral in einem Multimedia-Kommunikationsnetz gespeicherten Informationen |
US9113042B2 (en) * | 2009-08-28 | 2015-08-18 | Broadcom Corporation | Multi-wireless device channel communications |
US10637740B2 (en) * | 2017-07-07 | 2020-04-28 | Howard Pfeffer | Apparatus and methods for management, configuration and provisioning of communication devices in a distributed access architecture |
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GB2289198B (en) * | 1991-01-15 | 1996-01-10 | Rogers Cantel Inc | A remote antenna driver |
IL117221A0 (en) * | 1995-02-28 | 1996-06-18 | Gen Instrument Corp | Configurable hybrid medium access control for cable metropolitan area networks |
US5818438A (en) * | 1995-04-25 | 1998-10-06 | Bellsouth Corporation | System and method for providing television services |
US5734652A (en) * | 1995-09-27 | 1998-03-31 | Microsoft Corporation | ATM extended autoregistration and VPI/VCI assignment in a hybrid fiber-coax cable network |
SE515776C2 (sv) * | 1996-01-26 | 2001-10-08 | Telia Ab | System för radiokommunikation vid korta avstånd mellan sändare och mottagare |
US5812930A (en) * | 1996-07-10 | 1998-09-22 | International Business Machines Corp. | Information handling systems with broadband and narrowband communication channels between repository and display systems |
JPH10150460A (ja) * | 1996-11-19 | 1998-06-02 | Matsushita Electric Ind Co Ltd | 無線映像通信システム |
DE19703614C2 (de) * | 1997-01-31 | 1999-10-28 | Siemens Ag | Verfahren zum drahtlosen Übermitteln von nach einer Breitband-Übertragungstechnologie konzipierten Breitband-orientierten Datenströmen |
SE509582C2 (sv) * | 1997-06-05 | 1999-02-08 | Telia Ab | System vid telekommunikationsnät |
AU751788B2 (en) * | 1997-07-09 | 2002-08-29 | Winstar Communications, Inc. | A wireless system for providing symmetrical, bidirectional broadband telecommunications and multimedia services employing a computer-controlled radio system |
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- 2000-05-23 JP JP2000619933A patent/JP2003500947A/ja not_active Withdrawn
- 2000-05-23 WO PCT/FI2000/000463 patent/WO2000072595A1/en not_active Application Discontinuation
- 2000-05-23 EP EP00929574A patent/EP1181822A1/en not_active Withdrawn
- 2000-05-23 AU AU47597/00A patent/AU4759700A/en not_active Abandoned
- 2000-05-23 CN CN00807883A patent/CN1351798A/zh active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
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CN1599431B (zh) * | 2003-09-16 | 2010-09-15 | Lg电子有限公司 | 支持多显示器的机顶盒 |
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JP2003500947A (ja) | 2003-01-07 |
FI991178A (fi) | 2000-11-25 |
EP1181822A1 (en) | 2002-02-27 |
US20020056128A1 (en) | 2002-05-09 |
FI991178A0 (fi) | 1999-05-24 |
FI107107B (fi) | 2001-05-31 |
AU4759700A (en) | 2000-12-12 |
WO2000072595A1 (en) | 2000-11-30 |
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