公开(公告)号：EP1105981B1

公开(公告)日：2008-08-27

申请号：EP99943990.4

申请日：1999-08-27

申请人： QUALCOMM INCORPORATED

发明人： CHOCKALINGAM, Ananthanarayanan ,  TENNY, Nathan, E. ,  MILLER, David, S.

IPC分类号： H04B7/216

CPC分类号： H04B7/216

摘要： A system for reducing the number of required frequency and time hypotheses to acquire an access transmission in a satellite communication system. By reducing the number of required hypotheses, the amount of hardware required to acquire the access transmission is reduced. The method of the present invention reduces the number of required hypotheses by reducing the range of possible frequency and timing values of the access transmission. The range of possible frequency and timing values is reduced by determining the frequency and time uncertainties over individual satellite beams rather than over an entire satellite footprint.

公开(公告)号：EP1099315A1

公开(公告)日：2001-05-16

申请号：EP99937339.2

申请日：1999-07-21

申请人： QUALCOMM Incorporated

发明人： ANTONIO, Franklin, P. ,  MARSH, Gene, W. ,  STEWART, Richard, A. ,  BJEREDE, Marie, M. ,  CHOCKALINGAM, Ananthanarayanan ,  KERNS, Arthur, S. ,  BUTLER, Brian ,  GROB, Matthew, S. ,  DETERMAN, James, T. ,  GROVER, Douglas ,  SCHIFF, Leonard, N. ,  AMES, William, G.

IPC分类号： H04B7/02 ,  H04B7/185

CPC分类号： H04B7/18534

摘要： Method for reducing call dropping rates in a multi-beam communication system that includes a user terminal, a gateway, and a plurality of beam sources projecting a plurality of beams, and where a link between the user terminal and the gateway is established on one or more beams. The method relies on a messaging protocol between the gateway and the user. Based on messages sent from the user to the gateway, preferably on a preselected periodic basis, the gateway determines the more desirable beam(s) for transmitting to the user. The messages sent from the user to the gateway contain values representing beam strengths as measured at the user. The gateway uses the user measured beam strengths to select the beams that should be used for the user. The beams to be used are the beams that will decrease the call dropping rates and provide a desired level of beam source diversity.

公开(公告)号：EP1099315B1

公开(公告)日：2009-03-04

申请号：EP99937339.2

申请日：1999-07-21

申请人： QUALCOMM INCORPORATED

发明人： ANTONIO, Franklin, P. ,  MARSH, Gene, W. ,  STEWART, Richard, A. ,  BJEREDE, Marie, M. ,  CHOCKALINGAM, Ananthanarayanan ,  KERNS, Arthur, S. ,  BUTLER, Brian ,  GROB, Matthew, S. ,  DETERMAN, James, T. ,  GROVER, Douglas ,  SCHIFF, Leonard, N. ,  AMES, William, G.

IPC分类号： H04B7/02 ,  H04B7/185

CPC分类号： H04B7/18534

摘要： Method for reducing call dropping rates in a multi-beam communication system that includes a user terminal, a gateway, and a plurality of beam sources projecting a plurality of beams, and where a link between the user terminal and the gateway is established on one or more beams. The method relies on a messaging protocol between the gateway and the user. Based on messages sent from the user to the gateway, preferably on a preselected periodic basis, the gateway determines the more desirable beam(s) for transmitting to the user. The messages sent from the user to the gateway contain values representing beam strengths as measured at the user. The gateway uses the user measured beam strengths to select the beams that should be used for the user. The beams to be used are the beams that will decrease the call dropping rates and provide a desired level of beam source diversity.

公开(公告)号：EP1105981A1

公开(公告)日：2001-06-13

申请号：EP99943990.4

申请日：1999-08-27

申请人： QUALCOMM Incorporated

发明人： CHOCKALINGAM, Ananthanarayanan ,  TENNY, Nathan, E. ,  MILLER, David, S.

IPC分类号： H04B7/216

CPC分类号： H04B7/216

摘要： A system for reducing the number of required frequency and time hypotheses to acquire an access transmission in a satellite communication system. By reducing the number of required hypotheses, the amount of hardware required to acquire the access transmission is reduced. The method of the present invention reduces the number of required hypotheses by reducing the range of possible frequency and timing values of the access transmission. The range of possible frequency and timing values is reduced by determining the frequency and time uncertainties over individual satellite beams rather than over an entire satellite footprint.