[특허]Multicast message communicating method, multicast message communicating system, base station thereof, and mobile station thereof

NEC Corporation

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특허 상세정보

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Multicast message communicating method, multicast message communicating system, base station thereof, and mobile station thereof

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/00
미국특허분류(USC)	370/328; 455/522
출원번호	US-0598011 (2000-06-20)
우선권정보	JP-0175685 (1999-06-22)
발명자 / 주소	Naito, Kosuke
출원인 / 주소	NEC Corporation
대리인 / 주소	Dickstein, Shapiro, Morin & Oshinsky, LLP.
인용정보	피인용 횟수 : 43 인용 특허 : 9

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A multicast message communicating system is disclosed, that comprises a base station for transmitting a multicast message using a multicast channel, and a plurality of mobile stations for receiving the multicast message from the base station, wherein the base station has a receiving portion for receiving transmission power increase request signals from the plurality of mobile stations corresponding to reception powers of the multicast message received from the plurality of mobile stations, a reception power detecting portion for detecting the reception powers of the transmission power increase request signals received from the receiving portion, a transmission power control generating means for deciding and generating a transmission power increase request signal or a transmission power decrease request signal for the plurality of mobile stations corresponding to the received powers. ls from said speaker detection circuit is larger than a predetermined number, and for supplying the compressed voice codes from the detected voiced conference terminals to a second selector when said measured number is equal to or less than the predetermined number; andthe second selector for selecting said encoder when the measure number is larger than the predetermined number, for selecting said first selector when said measured number is equal to or less than the predetermined number, and for outputting the compressed voice code from either the selected encoder or first selector to said distribution circuit.2. The conference terminal control device according to claim 1, wherein said predetermined number is one.3. The conference terminal control device according to claim 1, wherein said conference terminal comprises and encoder for encoding voice and outputting the compressed voice code, a voiced/unvoiced judgment circuit for judging whether or not the voice is included in the encoded voice signal, and a multiplexer for multiplexing the judgment result of the voiced/unvoiced judgment circuit and said compressed voice code.4. The conference terminal control device according to claim 1, wherein when the number of conference terminals equal to a predetermined upper limit number of speakers is connected, said attenuation circuit sets an attenuation amount so that sound volume obtained by synthesizing speech from the conference terminals is equal to or less than a predetermined value.5. The conference terminal control device according to claim 1, wherein said attenuation circuit changes an attenuation amount in accordance with the number of speakers detected by said speaker detection circuit, and performs attenuation so that a sound volume of speech synthesized by said synthesizing circuit reaches a predetermined level.6. The conference terminal control device according to claim 1, wherein said attenuation circuit averages decoded speech sound volumes of the conference terminals, and performs attenuation so that a sound volume of speech synthesized by said synthesizing circuit reaches a predetermined level.7. The conference terminal control device according to claim 3, wherein when the number of conference terminals equal to a predetermined upper limit number of speakers is connected, said attenuation circuit sets an attenuation amount so that sound volume obtained by synthesizing speech from the conference terminals is equal to or less than a predetermined value.8. The conference terminal control device according to claim 3, wherein said attenuation circuit changes an attenuation amount in accordance with the number of speakers detected by said speaker detection circuit, and performs attenuation so that a sound volume of speech synthesized by said synthesizing circuit reaches a predetermined level.9. The conference terminal control device according to claim 3, wherein said attenuation circuit averages decoded speech sound volumes of the conference terminals, and performs attenuation so that a sound volume of speech synthesized by said synthesizing circuit reaches a predetermined level.10. The conference terminal control device according to claim 2, wherein said conference terminal comprises and encoder for encoding voice and outputting the compressed voice code, a voiced/unvoiced judgment circuit for judging whether or not the voice is included in the encoded voice signal, and a multiplexer for multiplexing the judgment result of the voiced/unvoiced judgment circuit and said compressed voice code.11. The conference terminal control device according to claim 2, wherein when the number of conference terminals equal to a predetermined upper limit number of speakers is connected, said attenuation circuit sets an attenuation amount so that sound volume obtained by synthesizing speech from the conference terminals is equal to or less than a predetermined value.12. The conference terminal control device acco rding to claim 2, wherein said attenuation circuit changes an attenuation amount in accordance with the number of speakers detected by said speaker detection circuit, and performs attenuation so that a sound volume of speech synthesized by said synthesizing circuit reaches a predetermined level.13. The conference terminal control device according to claim 2, wherein said attenuation circuit averages decoded speech sound volumes of the conference terminals, and performs attenuation so that a sound volume of speech synthesized by said synthesizing circuit reaches a predetermined level.14. The conference terminal control device according to claim 4, wherein said attenuation circuit averages decoded speech sound volumes of the conference terminals, and performs attenuation so that a sound volume of speech synthesized by said synthesizing circuit reaches a predetermined level.15. The conference terminal control device according to claim 5, wherein said attenuation circuit averages decoded speech sound volumes of the conference terminals, and performs attenuation so that a sound volume of speech synthesized by said synthesizing circuit reaches a predetermined level. luding carrying out said exchanging, said determining and said evaluating steps according to Border Gateway Protocol.7. The method of claim 1, including carrying out said determining step by setting a first probability (p1) for an edge insertion operation, a second probability (p2) for a node insertion operation, a third probability (p3) for an edge deletion operation, and a fourth probability (p4) for a node deletion operation, wherein p1+p2+p3+p4=1.8. The method of claim 7, including setting p1+p2>p3+p4.9. The method of claim 1, including defining each test of network topology in the determining step as a bipartite graph Gb= wherein V=set of router nodes, W=set of network nodes, and Eb=set of edges between V and W.10. The method of claim 9, including setting an initial test network topology in the determining step as an empty graph Gb={v0, &phgr;, &phgr;} wherein node v0corresponds to the router under test.11. The method of claim 7, including carrying out the determining step for each successive test network topology by generating a number x uniformly at random wherein 0≦x≦1, and selecting one of said four operations including an edge insertion if x≦p1, a node insertion if p1

이 특허에 인용된 특허 (9)

이 특허를 인용한 특허 피인용횟수: 43

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Multicast message communicating method, multicast message communicating system, base station thereof, and mobile station thereof

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Multicast message communicating method, multicast message communicating system, base station thereof, and mobile station thereof

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이 특허에 인용된 특허 (9)

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IPC 상위 출원인

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IPC 상세정보(version : 201201)

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