Collision avoidance of rach signals in a TDMA satellite communication system

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United States of America Patent

PATENT NO 7457269
SERIAL NO

10258030

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Abstract

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In a cellular mobile telephone system, a mobile station (4d, 4e) requests allocation of a traffic channel by sending a request in a random access channel. Where there is a significant path length difference between locations in a cell and a network antenna, for instance on a satellite (3), not all of the available TDMA slots are used for random access signals. Instead, gaps of one to three time slots are left between valid random access time slots (103, 104) to avoid collision between random access bursts arriving at the network antenna along paths of different lengths.

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Patent Owner(s)

  • DBSD SERVICES LIMITED

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Grayson, Mark Chiswick, GB 204 3595

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