Mobile radio communication system, mobile station, and method for controlling diversity hand-over branch
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04Q-007/00
H04L-012/26
H04L-001/00
H04J-001/16
출원번호
US-0230956
(1999-02-04)
우선권정보
JP-0146940 (1997-06-04)
국제출원번호
PCT/JP98/02456
(1998-06-03)
국제공개번호
WO98/56196
(1998-12-10)
발명자
/ 주소
Ohtani, Tomoyuki
Tamura, Motoshi
Sato, Takaaki
출원인 / 주소
NTT DoCoMo, Inc.
대리인 / 주소
Workman Nydegger
인용정보
피인용 횟수 :
12인용 특허 :
12
초록▼
A branch candidate selecting method by a mobile station and a diversity handover control method on a network side in DHO performance are provided which consider a maximum cable branch number and a maximum radio branch number of the mobile station, when the mobile station detects a plurality of addit
A branch candidate selecting method by a mobile station and a diversity handover control method on a network side in DHO performance are provided which consider a maximum cable branch number and a maximum radio branch number of the mobile station, when the mobile station detects a plurality of addition branch candidates and deletion branch candidates. The mobile station inserts a plurality of addition branch candidates and deletion branch candidates, that is, all the DHO candidates into one handover trigger signal, and notifies the network. The addition branch candidates are put into addition information parameters in the handover trigger signal, and the deletion branch candidates are put into deletion information parameters. To simplify processing on the network side, the network side separates the addition branch candidates from the deletion branch candidates, and carries out sequential processing of them independently.
대표청구항▼
A branch candidate selecting method by a mobile station and a diversity handover control method on a network side in DHO performance are provided which consider a maximum cable branch number and a maximum radio branch number of the mobile station, when the mobile station detects a plurality of addit
A branch candidate selecting method by a mobile station and a diversity handover control method on a network side in DHO performance are provided which consider a maximum cable branch number and a maximum radio branch number of the mobile station, when the mobile station detects a plurality of addition branch candidates and deletion branch candidates. The mobile station inserts a plurality of addition branch candidates and deletion branch candidates, that is, all the DHO candidates into one handover trigger signal, and notifies the network. The addition branch candidates are put into addition information parameters in the handover trigger signal, and the deletion branch candidates are put into deletion information parameters. To simplify processing on the network side, the network side separates the addition branch candidates from the deletion branch candidates, and carries out sequential processing of them independently. conference bridge within each of said plurality of communication groups.3. A method as recited in claim 2, wherein said sampling step comprises sampling the audio signal from each of the communication units within said each of said plurality of communication groups.4. A method as recited in claim 1, wherein said plurality of quantized values are exchanged between said plurality of conference bridges via signaling channels between said plurality of conference bridges.5. A method as recited in claim 4, wherein said signaling channels are over a local area network (LAN), intranet or Internet.6. A method as recited in claim 4, wherein said signaling channels are over a wireless network.7. A method as recited in claim 1, wherein said transmitting step comprises:sending an instruction to said overall dominant communication unit to transmit said signal of said overall dominant communication unit directly to all of said plurality of communication units in said multipoint conference via a multicast transmission of said signal of said overall dominant communication unit, said signal comprising audio packets and video packets of said overall dominant communication unit.8. A method as recited in claim 1 wherein said transmitting step comprises:transmitting said signal of said overall dominant communication unit via said plurality of said conference bridges to all of their local communication units in said multipoint conference, said signal comprising audio packets and video packets of said overall dominant communication unit.9. A method as recited in claim 1, wherein said transmitting step comprises:sending to said conference bridge associated with said overall dominant communication unit the addresses of the local communication units from each of the others of said plurality of said conference bridges; andtransmitting said signal of said overall dominant communication unit directly to all of said plurality of communication units in said multipoint conference via a multicast transmission from said conference bridge associated with said overall dominant communication unit, said signal comprising audio packets and video packets of said overall dominant communication unit.10. A method as recited in claim 1, wherein said multipoint conference comprises a multimedia conference, a videoconference, an audio conference, and/or a ToL conference.11. A system for establishing a multipoint conference among a plurality of communication groups, wherein each communication group includes a conference bridge and a plurality of local communication units, comprising: a plurality of conference bridges, each conference bridge logically coupled to a plurality of local communication units by way of a corresponding I/O port of said conference bridge, and wherein each conference bridge includes a selector unit configured to determine a dominant local communication unit among said plurality of local communication units in each of said plurality of communication groups, and wherein said plurality of conference bridges exchange a plurality of quantized signals to determine an overall dominant communication unit, each quantized signal representing the signal of a corresponding dominant local communication unit, and wherein a dominant signal of said overall dominant communication unit is transmitted to each of the plurality of communication groups.12. A system as recited in claim 11, wherein each selector unit determines the dominant local communication unit by sampling the signal of each of its local communication units and comparing the sampled signals to determining the dominant local communication unit.13. A system as recited in claim 12, wherein said signal is an audio signal and said dominant signal is formed of audio packets and video packets.14. A system as recited in claim 11, wherein said dominant signal of said overall dominant communication unit is transmit
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이 특허에 인용된 특허 (12)
Sundelin Magnus,SEX ; Knutsson Jens,SEX ; Butovitsch Paul Peter,SEX ; Thornberg Carl M.,JPX, Downlink power control in a cellular mobile radio communications system.
Gilhousen Klein S. (Bozeman MT) Padovani Roberto (San Diego CA) Weaver ; Jr. Lindsay A. (Boulder CO), Method and apparatus for performing handoff between sectors of a common base station.
Shiotsuki Hirofumi (Tokyo JPX) Yamaguchi Kenji (Tokyo JPX), Method and arrangement of effectively reducing signal strength measurements for a handoff in a cellular mobile communica.
Blakeney ; II Robert D. (San Diego CA) Karmi Gadi (San Diego CA) Tiedemann ; Jr. Edward G. (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA), Mobile station assisted soft handoff in a CDMA cellular communications system.
Tanoue,Katsumi, CDMA mobile communication system in which updating of a reference value for controlling closed-loop transmission power is realized in a base transceiver station.
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