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公开(公告)号：JP2000165349A
公开(公告)日：2000-06-16
申请号：JP24745199
申请日：1999-09-01
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HOFFBECK JOSEPH P , MEYERS MARTIN HOWARD , PREMJI AL-NASIR A , TARRAF AHMED A , TRACY KEVIN G
Abstract: PROBLEM TO BE SOLVED: To prevent loss or degradation at the time of transmission through a wireless transmission channel by detecting critical frames and improving the strength thereof before transmitting them. SOLUTION: A power controller 305 controls whether each frame in the power output of a channel encoder 303 is to be determined as a critical frame or not to be determined as a function for each frame. Therefore, when it is detected the critical bit in a bit stream outputted by a critical frame detector 204 is set by the power controller 305, the power controller 305 increases and strengthens the transmission power output of the channel encoder 303 for that frame and decreases each frame resetting the critical bit into normal power output level.
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公开(公告)号：AU4475299A
公开(公告)日：2000-03-16
申请号：AU4475299
申请日：1999-08-26
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HOFFBECK JOSEPH P , TRACY KEVIN G , TARRAF AHMED A , PREMJI AL-NASIR A , MEYERS MARTIN HOWARD
Abstract: It has been recognized that in a wireless communication system certain frames of encoded speech data transmitted between a base station and a mobile unit, or between a mobile unit and a base station, are more critical than others. A frame may be determined to be erased by the receiving base station or mobile unit due to noise or interference over the wireless transmission medium. If an erased frame cannot be recreated from one or more preceding frames, then it is more critical than a frame that can be recreated by an extrapolation of data from one or more preceding frames. Accordingly, on a frame-by-frame basis, each frame in a sequence of frames is identified as being critical or non-critical. Each frame that is identified as being critical is then transmitted in a manner that is more robust than the manner in which non-critical frames are transmitted to decrease the likelihood that a receiver will determine that the frame is erased. In a CDMA system, a current frame is identified as being critical by forming a weighted sum of the differences between corresponding frame parameters that represent the current frame and frame parameters that represent a previous frame. That weighted sum is compared with a threshold. If the weighted sum exceeds the threshold, then the current frame is classified as being a critical frame and is transmitted at a higher output level than non-critical frames are transmitted.
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公开(公告)号：DE69934284T2
公开(公告)日：2007-05-31
申请号：DE69934284
申请日：1999-08-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HOFFBECK JOSEPH P , MEYERS MARTIN HOWARD , PREMJI AL-NASIR A , TARRAF AHMED A , TRACY KEVIN G
Abstract: It has been recognized that in a wireless communication system certain frames of encoded speech data transmitted between a base station and a mobile unit, or between a mobile unit and a base station, are more critical than others. A frame may be determined to be erased by the receiving base station or mobile unit due to noise or interference over the wireless transmission medium. If an erased frame cannot be recreated from one or more preceding frames, then it is more critical than a frame that can be recreated by an extrapolation of data from one or more preceding frames. Accordingly, on a frame-by-frame basis, each frame in a sequence of frames is identified as being critical or non-critical. Each frame that is identified as being critical is then transmitted in a manner that is more robust than the manner in which non-critical frames are transmitted to decrease the likelihood that a receiver will determine that the frame is erased. In a CDMA system, a current frame is identified as being critical by forming a weighted sum of the differences between corresponding frame parameters that represent the current frame and frame parameters that represent a previous frame. That weighted sum is compared with a threshold. If the weighted sum exceeds the threshold, then the current frame is classified as being a critical frame and is transmitted at a higher output level than non-critical frames are transmitted.
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Patent Agency Ranking
公开(公告)号：DE69934284D1
公开(公告)日：2007-01-18
申请号：DE69934284
申请日：1999-08-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HOFFBECK JOSEPH P , MEYERS MARTIN HOWARD , PREMJI AL-NASIR A , TARRAF AHMED A , TRACY KEVIN G
Abstract: It has been recognized that in a wireless communication system certain frames of encoded speech data transmitted between a base station and a mobile unit, or between a mobile unit and a base station, are more critical than others. A frame may be determined to be erased by the receiving base station or mobile unit due to noise or interference over the wireless transmission medium. If an erased frame cannot be recreated from one or more preceding frames, then it is more critical than a frame that can be recreated by an extrapolation of data from one or more preceding frames. Accordingly, on a frame-by-frame basis, each frame in a sequence of frames is identified as being critical or non-critical. Each frame that is identified as being critical is then transmitted in a manner that is more robust than the manner in which non-critical frames are transmitted to decrease the likelihood that a receiver will determine that the frame is erased. In a CDMA system, a current frame is identified as being critical by forming a weighted sum of the differences between corresponding frame parameters that represent the current frame and frame parameters that represent a previous frame. That weighted sum is compared with a threshold. If the weighted sum exceeds the threshold, then the current frame is classified as being a critical frame and is transmitted at a higher output level than non-critical frames are transmitted.
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公开(公告)号：CA2279124A1
公开(公告)日：2000-03-03
申请号：CA2279124
申请日：1999-07-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MEYERS MARTIN HOWARD , HOFFBECK JOSEPH P , PREMJI AL-NASIR A , TARRAF AHMED A , TRACY KEVIN G
Abstract: It has been recognized that in a wireless communication system certain frames of encoded speech data transmitted between a base station and a mobile unit, or between a mobile unit and a base station, are more critical than others. A frame may be determined to be erased by the receiving base station or mobile unit due to noise or interference over the wireless transmission medium. If an erased frame cannot be recreated from one or more preceding frames, then it is more critical than a frame that can be recreated by an extrapolation of data from one or more preceding frames. Accordingly, on a frame-by-frame basis, each frame in a sequence of frames is identified as being critical or non-critical. Each frame that is identified as being critical is then transmitted in a manner that is more robust than the manner in which non-critical frames are transmitted to decrease the likelihood that a receiver will determine that the frame is erased. In a CDMA system, a current frame is identified as being critical by forming a weighted sum of the differences between corresponding frame parameters that represent the current frame and frame parameters that represent a previous frame. That weighted sum is compared with a threshold. If the weighted sum exceeds the threshold, then the current frame is classified as being a critical frame and is transmitted at a higher output level than non-critical frames are transmitted.
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公开(公告)号：ES2275329T3
公开(公告)日：2007-06-01
申请号：ES99306658
申请日：1999-08-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HOFFBECK JOSEPH P , MEYERS MARTIN HOWARD , PREMJI AL-NASIR A , TARRAF AHMED A , TRACY KEVIN G
Abstract: Un método para transmitir una señal digital que está organizada en una secuencia de tramas hacia un receptor por un medio de transmisión, en que el método comprende los pasos de: determinar antes de ser transmitida si una trama actual en la secuencia de tramas es una trama crítica o una trama no crítica; si la trama actual es designada como trama no crítica, transmitir la trama actual no crítica de una primera manera; y si la trama actual es designada como trama crítica, transmitir la trama actual crítica de una segunda manera que es más robusta que la primera manera, en que la segunda manera es tal que hay menor probabilidad en comparación con la primera manera de que el receptor determine que la trama actual sea una trama borrada.
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公开(公告)号：AT347757T
公开(公告)日：2006-12-15
申请号：AT99306658
申请日：1999-08-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HOFFBECK JOSEPH P , MEYERS MARTIN HOWARD , PREMJI AL-NASIR A , TARRAF AHMED A , TRACY KEVIN G
Abstract: It has been recognized that in a wireless communication system certain frames of encoded speech data transmitted between a base station and a mobile unit, or between a mobile unit and a base station, are more critical than others. A frame may be determined to be erased by the receiving base station or mobile unit due to noise or interference over the wireless transmission medium. If an erased frame cannot be recreated from one or more preceding frames, then it is more critical than a frame that can be recreated by an extrapolation of data from one or more preceding frames. Accordingly, on a frame-by-frame basis, each frame in a sequence of frames is identified as being critical or non-critical. Each frame that is identified as being critical is then transmitted in a manner that is more robust than the manner in which non-critical frames are transmitted to decrease the likelihood that a receiver will determine that the frame is erased. In a CDMA system, a current frame is identified as being critical by forming a weighted sum of the differences between corresponding frame parameters that represent the current frame and frame parameters that represent a previous frame. That weighted sum is compared with a threshold. If the weighted sum exceeds the threshold, then the current frame is classified as being a critical frame and is transmitted at a higher output level than non-critical frames are transmitted.
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公开(公告)号：BR9903932A
公开(公告)日：2000-08-29
申请号：BR9903932
申请日：1999-08-24
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MEYERS MARTIN HOWARD , TARRAF AHMED A , HOFFBECK JOSEPH P , PREMJI AL-NASIR A , TRACY KEVIN G
Abstract: It has been recognized that in a wireless communication system certain frames of encoded speech data transmitted between a base station and a mobile unit, or between a mobile unit and a base station, are more critical than others. A frame may be determined to be erased by the receiving base station or mobile unit due to noise or interference over the wireless transmission medium. If an erased frame cannot be recreated from one or more preceding frames, then it is more critical than a frame that can be recreated by an extrapolation of data from one or more preceding frames. Accordingly, on a frame-by-frame basis, each frame in a sequence of frames is identified as being critical or non-critical. Each frame that is identified as being critical is then transmitted in a manner that is more robust than the manner in which non-critical frames are transmitted to decrease the likelihood that a receiver will determine that the frame is erased. In a CDMA system, a current frame is identified as being critical by forming a weighted sum of the differences between corresponding frame parameters that represent the current frame and frame parameters that represent a previous frame. That weighted sum is compared with a threshold. If the weighted sum exceeds the threshold, then the current frame is classified as being a critical frame and is transmitted at a higher output level than non-critical frames are transmitted.
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