초록 ▼

A novel and improved method and apparatus for signal acquisition in a wireless telecommunication system having large transmission delay uncertainty is described. A terminal first acquires the forward link signal from a hub and extracts timing information from that forward link signal. Using the timi

A novel and improved method and apparatus for signal acquisition in a wireless telecommunication system having large transmission delay uncertainty is described. A terminal first acquires the forward link signal from a hub and extracts timing information from that forward link signal. Using the timing information the terminal estimates the time at which a next search window takes place during an access slot, and the time and pseudorandom code state necessary to transmit an access probe so as to arrive at during the search window assuming the terminal is located a maximum distance from the hub. The terminal proceeds to transmit additional access probes at times occurring one access slot period plus a delta time interval after the previous transmission. The delta time interval has a duration less than that of a search window associated with each access slot. Each access probe is processed with various transmission codes the states of which are incremented by an access slot period for each access probe transmitted.

대표청구항 ▼

[ We claim:] [1.] A method for signal acquisition in a wireless communication system between a terminal and a hub comprising the steps of:transmitting a system time message from said hub at a system message transmit time;receiving said system time message at said terminal at a system message receive

[ We claim:] [1.] A method for signal acquisition in a wireless communication system between a terminal and a hub comprising the steps of:transmitting a system time message from said hub at a system message transmit time;receiving said system time message at said terminal at a system message receive time following said system message transmit time by an unknown amount of time;determining a first access probe transmit time for transmitting a first access probe from said terminal;transmitting said first access probe from said terminal at said first access probe transmit time; andsequentially transmitting a plurality of additional access probes each offset from one another by an amount of time equal to said time period adjusted by a delta time interval, wherein said delta time interval is set to a duration shorter than the duration of any one of a set of predetermined sequential search windows employed by said hub, said search windows of substantially equal duration and offset from one another by a set time period.