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    • 2. 发明专利
    • FI119616B
    • 2009-01-15
    • FI20031505
    • 2003-10-15
    • LAAMANEN HEIKKI TAPIOGOWDA UMESH CHANDRA
    • LAAMANEN HEIKKI TAPIOGOWDA UMESH CHANDRA
    • H04M19/00H04B3/44H04B10/272
    • The objective of the invention is to devise a method for establishing a subscriber connection and a system applying the method. According to the method, a digital subscriber connection consisting of a composition of an optical fiber and a metallic pair cable is implemented by transporting a digital information stream in two directions over an optical fiber (2) between a central site and equipment (103) which is connected to the metallic pair cable (4) of each subscriber. According to the invention, the information streams transmitted and received over the pair cables are multiplexed onto the optical fiber by using a multiplexing method of optical signals, whereby the information streams originating from different subscribers are combined onto the fiber by means of passive optical elements and whereby the information streams transmitted from the central site are distributed to each subscriber-specific optical-to-electric conversion element (105) by means of passive optical elements. Thus the multiplexing and demultiplexing need no active multiplexing/demultiplexing electronics common to all subscribers, but rather the active electronics of the conversion elements (105) of each subscriber operates independently without being dependent on the state of operation of other subscriber's conversion elements. Hence the operating power for said electronics can be fed from the respective subscriber through the subscriber's pair cable.
    • 3. 发明专利
    • FI20031505A0
    • 2003-10-15
    • FI20031505
    • 2003-10-15
    • LAAMANEN HEIKKI TAPIOGOWDA UMESH CHANDRA
    • LAAMANEN HEIKKI TAPIOGOWDA UMESH CHANDRA
    • H04B10/272H04MH04B
    • The objective of the invention is to devise a method for establishing a subscriber connection and a system applying the method. According to the method, a digital subscriber connection consisting of a composition of an optical fiber and a metallic pair cable is implemented by transporting a digital information stream in two directions over an optical fiber (2) between a central site and equipment (103) which is connected to the metallic pair cable (4) of each subscriber. According to the invention, the information streams transmitted and received over the pair cables are multiplexed onto the optical fiber by using a multiplexing method of optical signals, whereby the information streams originating from different subscribers are combined onto the fiber by means of passive optical elements and whereby the information streams transmitted from the central site are distributed to each subscriber-specific optical-to-electric conversion element (105) by means of passive optical elements. Thus the multiplexing and demultiplexing need no active multiplexing/demultiplexing electronics common to all subscribers, but rather the active electronics of the conversion elements (105) of each subscriber operates independently without being dependent on the state of operation of other subscriber's conversion elements. Hence the operating power for said electronics can be fed from the respective subscriber through the subscriber's pair cable.
    • 4. 发明专利
    • FI20031505A
    • 2005-04-16
    • FI20031505
    • 2003-10-15
    • LAAMANEN HEIKKI TAPIOGOWDA UMESH CHANDRA
    • LAAMANEN HEIKKI TAPIOGOWDA UMESH CHANDRA
    • H04B10/272H04M19/00H04Q3/44
    • The objective of the invention is to devise a method for establishing a subscriber connection and a system applying the method. According to the method, a digital subscriber connection consisting of a composition of an optical fiber and a metallic pair cable is implemented by transporting a digital information stream in two directions over an optical fiber (2) between a central site and equipment (103) which is connected to the metallic pair cable (4) of each subscriber. According to the invention, the information streams transmitted and received over the pair cables are multiplexed onto the optical fiber by using a multiplexing method of optical signals, whereby the information streams originating from different subscribers are combined onto the fiber by means of passive optical elements and whereby the information streams transmitted from the central site are distributed to each subscriber-specific optical-to-electric conversion element (105) by means of passive optical elements. Thus the multiplexing and demultiplexing need no active multiplexing/demultiplexing electronics common to all subscribers, but rather the active electronics of the conversion elements (105) of each subscriber operates independently without being dependent on the state of operation of other subscriber's conversion elements. Hence the operating power for said electronics can be fed from the respective subscriber through the subscriber's pair cable.
    • 6. 发明专利
    • FI111898B
    • 2003-09-30
    • FI20011665
    • 2001-08-17
    • GOWDA UMESH CHANDRALAAMANEN HEIKKI TAPIO
    • GOWDA UMESH CHANDRALAAMANEN HEIKKI TAPIO
    • H04B10/272H04L12/28H04M11/06H04B10/20
    • The objective of the invention is a method for establishing a subscriber connection and a system applying the method. According to the method, a digital subscriber connection of the FTTC type, consisting of a composition of an optical fiber and a metallic pair cable, is implemented by means of subscriber-specific DSL modems, whereby (a) a subscriber connection comprises an optical fiber (3), a metallic pair cable (6), and equipment (8) adapting the said fiber and cable to each other so that the optical fiber goes towards the telephone exchange or conentrator and the pair cable goes towards the subscriber, and (b) each DSL modem comprises digital transmitter and receiver elements (21,22) connected functionally to analog parts (5) that are adapted to convert (i) the digital output signal of the digital transmitter element (21) into analog form and (ii) the analog signal intended for the receiver element (22) into digital form. In accordance with the method, the analog parts (5) of the DSL modems are inserted into the said equipment (8), the digital signal produced by the DSL modem transmitter element (21) is transferred to the respective analog parts (5) through the optical fiber (3), and the digital signal produced by the DSL modem analog parts (5) is transferred to the respective digital receiver element (22) through the said fiber.
    • 7. 发明专利
    • FI20011665A
    • 2003-02-18
    • FI20011665
    • 2001-08-17
    • GOWDA UMESH CHANDRALAAMANEN HEIKKI TAPIO
    • GOWDA UMESH CHANDRALAAMANEN HEIKKI TAPIO
    • H04B10/272H04L12/28H04M
    • The objective of the invention is a method for establishing a subscriber connection and a system applying the method. According to the method, a digital subscriber connection of the FTTC type, consisting of a composition of an optical fiber and a metallic pair cable, is implemented by means of subscriber-specific DSL modems, whereby (a) a subscriber connection comprises an optical fiber (3), a metallic pair cable (6), and equipment (8) adapting the said fiber and cable to each other so that the optical fiber goes towards the telephone exchange or conentrator and the pair cable goes towards the subscriber, and (b) each DSL modem comprises digital transmitter and receiver elements (21,22) connected functionally to analog parts (5) that are adapted to convert (i) the digital output signal of the digital transmitter element (21) into analog form and (ii) the analog signal intended for the receiver element (22) into digital form. In accordance with the method, the analog parts (5) of the DSL modems are inserted into the said equipment (8), the digital signal produced by the DSL modem transmitter element (21) is transferred to the respective analog parts (5) through the optical fiber (3), and the digital signal produced by the DSL modem analog parts (5) is transferred to the respective digital receiver element (22) through the said fiber.
    • 8. 发明专利
    • FI20011665A0
    • 2001-08-17
    • FI20011665
    • 2001-08-17
    • GOWDA UMESH CHANDRA
    • GOWDA UMESH CHANDRA
    • H04B10/272H04L12/28H04J
    • The objective of the invention is a method for establishing a subscriber connection and a system applying the method. According to the method, a digital subscriber connection of the FTTC type, consisting of a composition of an optical fiber and a metallic pair cable, is implemented by means of subscriber-specific DSL modems, whereby (a) a subscriber connection comprises an optical fiber (3), a metallic pair cable (6), and equipment (8) adapting the said fiber and cable to each other so that the optical fiber goes towards the telephone exchange or conentrator and the pair cable goes towards the subscriber, and (b) each DSL modem comprises digital transmitter and receiver elements (21,22) connected functionally to analog parts (5) that are adapted to convert (i) the digital output signal of the digital transmitter element (21) into analog form and (ii) the analog signal intended for the receiver element (22) into digital form. In accordance with the method, the analog parts (5) of the DSL modems are inserted into the said equipment (8), the digital signal produced by the DSL modem transmitter element (21) is transferred to the respective analog parts (5) through the optical fiber (3), and the digital signal produced by the DSL modem analog parts (5) is transferred to the respective digital receiver element (22) through the said fiber.
    • 10. 发明授权
    • Media adaptation determination for wireless terminals
    • 无线终端的媒体自适应确定
    • US08886824B2
    • 2014-11-11
    • US10765576
    • 2004-01-26
    • Stephane CoulombeUmesh Chandra
    • Stephane CoulombeUmesh Chandra
    • G06F15/16H04W4/18H04W88/18H04L12/58
    • H04L51/10H04L51/04H04L51/066H04L51/38H04W4/18H04W88/184
    • A method (and corresponding equipment) by which a multimedia message is sent from a sending terminal (21) via a messaging server (22)—such as a MMS Proxy-Relay in MMS or a SIP proxy server in SIP IM—to a receiving terminal (25) having limited multimedia capabilities, with the sending terminal (21) adapted to include a user agent (21a) for inserting, into the message, media characteristics of the message sufficient in detail to enable the messaging server (22) to determine whether the message should be transcoded based on actual or assumed multimedia capabilities of the receiving terminal (25), and with the messaging server (22) configured to read the media characteristics and decide whether the message should be transcoded based only on the inserted media characteristics and on actual or assumed multimedia capabilities of the receiving terminal (25). The media characteristics are advantageously inserted into the header of the message.
    • 一种通过消息传送服务器(22)从发送终端(21)发送多媒体消息的方法(以及对应的设备),例如MMS中的MMS代理中继或SIP IM中的SIP代理服务器到接收 终端(25)具有有限的多媒体能力,发送终端(21)适于包括用户代理(21a),用于向消息中插入足够详细信息的消息的媒体特性,以使消息服务器(22)能够确定 是否应该基于接收终端(25)的实际或假定的多媒体能力对消息进行代码转换,并且消息传送服务器(22)被配置为读取媒体特性并且基于插入的媒体特性来确定消息是否应该被转码 以及接收终端(25)的实际或假定的多媒体能力。 媒体特性有利地插入消息的标题中。