Collision avoidance of rach signals in a TDMA satellite...

Details Collision avoidance of rach signals in a TDMA satellite... Collision avoidance of rach signals in a TDMA satellite...

2000-04-20

2008-11-25

Nguyen, Chau (Department: 2616)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S447000, C370S461000

Reexamination Certificate

active

07457269

ABSTRACT:
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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