Method and arrangement for transferring information in a packet radio service
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04Q-007/20
H04Q-007/00
H04B-007/212
H04J-003/24
H04L-012/66
출원번호
US-0447988
(1999-11-23)
우선권정보
FI-19982577 (1998-11-27)
발명자
/ 주소
Forssell, Mika
Parantainen, Janne
출원인 / 주소
Nokia Mobile Phones Ltd.
대리인 / 주소
Perman & Green LLP
인용정보
피인용 횟수 :
58인용 특허 :
10
초록▼
The invention relates generally to a method and an arrangement for transferring information in a packet radio service. Especially the invention applies to transferring delay sensitive data, such as speech and video data, in a mobile telecommunications system. It is an object of this invention to pro
The invention relates generally to a method and an arrangement for transferring information in a packet radio service. Especially the invention applies to transferring delay sensitive data, such as speech and video data, in a mobile telecommunications system. It is an object of this invention to provide a solution, in which the physical connection of a packet radio service is kept reserved also during the passive periods of a session but the same physical resource can still be shared between multiple users. A basic idea of the invention is that the network is informed at the end of an active period, on whether a passive period follows the active period or if the connection can be released. When an active period starts after a passive period, the connection preferably reserves the packet data channel again, and possible other users of the channel are assigned to other channels.
대표청구항▼
The invention relates generally to a method and an arrangement for transferring information in a packet radio service. Especially the invention applies to transferring delay sensitive data, such as speech and video data, in a mobile telecommunications system. It is an object of this invention to pro
The invention relates generally to a method and an arrangement for transferring information in a packet radio service. Especially the invention applies to transferring delay sensitive data, such as speech and video data, in a mobile telecommunications system. It is an object of this invention to provide a solution, in which the physical connection of a packet radio service is kept reserved also during the passive periods of a session but the same physical resource can still be shared between multiple users. A basic idea of the invention is that the network is informed at the end of an active period, on whether a passive period follows the active period or if the connection can be released. When an active period starts after a passive period, the connection preferably reserves the packet data channel again, and possible other users of the channel are assigned to other channels. ethod as claimed in claim 1, characterized in that impulse responses are estimated from the received signals, and the impulse responses are averaged by integrating them over some integration time. 7. A method as claimed in claim 1, characterized in that azimuth angles estimated from the received signals are averaged by integrating them over some integration time. 8. A method as claimed in claim 1, characterized in that the strength of the received signal is calculated as a function of the direction of arrival of the signal from the received signal power, in the calculation of which the impulse response of the received signal is used. 9. A method as claimed in claim 1, characterized in that the strength of the received signal is calculated as a function of the direction of arrival of the signal from the received signal impulse response, which is formed by utilizing previously known signal components of the received signal, a pilot signal or a training sequence. 10. A method as claimed in claim 1, characterized in that the main beam and each diversity beam are directed to be mutually orthogonal. 11. A method for directing an antenna beam, the method being used in the transmission direction in a radio system which comprises transceivers forming antenna beams and in which transmitted signals, which propagate via different paths to the transceiver, are received, characterized in that directions of arrival of received signals are estimated on receiving the signals that have propagated via different paths, strengths of signals received from different directions of arrival are measured, and the main antenna beam, which is directed towards the direction of arrival of the strongest signal, is formed in the downlink direction of the transceiver, and one or more diversity beams are formed, which are directed towards some other direction than the main antenna beam, and the diversity beam signals are formed in such a way that the subscriber terminal serving as a transceiver may differentiate the signals transmitted by different beams. 12. A method as claimed in claim 2, characterized in that in the method, the transmission of the main beam and one or more diversity beams is delayed in relation to one another. 13. A method as claimed in claim 2, characterized in that the phase of the carrier used for transmitting the signals of one or more beams is quasi-randomly changed. 14. A method as claimed in claim 2, characterized in that codes are used in the signals of the main antenna beam or one or more diversity beams, on the basis of which codes the signals transmitted in different beams can be separated from one another at the subscriber terminal. 15. A method as claimed in claim 2, characterized in that the signals of the main antenna beam and one or more diversity beams are transmitted alternately in different beams of the transceiver. 16. A method as claimed in claim 2, characterized in that signals received by the subscriber terminal serving as a receiver are measured and the measuring results are transmitted to the base station, on the basis of which information the beams to be transmitted to the subscriber terminal are selected. 17. A method as claimed in claim 2, characterized in that the main antenna beam and one or more diversity beams are formed, if the delays of the received signals differ from one another. 18. A transceiver, which comprises antenna arrays (150) forming antenna beams in the transmission direction, by means of which beams a signal is transmitted, and which receives signals that propagate via different paths to the transceiver, characterized in that the transceiver comprises estimating means (101) for estimating the directions of arrival of the received signals when the transceiver receives signals that have propagated via different paths, measuring means (102) for measuring the strengths of the signals received from different directions of arrival, and beam directing means (103) for commanding the antenna
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