METHOD FOR DEEP PAGING
PROBLEM TO BE SOLVED: To provide a method for deep paging in a communication system employing orthogonal channelizing codes, such as Walsh sequences, of predetermined length m, that does not require a high powered paging channel.SOLUTION: The method includes the steps of generating a paging channel...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a method for deep paging in a communication system employing orthogonal channelizing codes, such as Walsh sequences, of predetermined length m, that does not require a high powered paging channel.SOLUTION: The method includes the steps of generating a paging channel message which is combined with a Walsh sequence having a length greater than or equal to 2 m, and transmitting the paging channel message at a data rate of less than 480 bits per second (bps). By transmitting the paging channel message at a low data rate and receiving energy over a 1000 times longer period, the message is able to penetrate buildings and other structures or high attenuation environments, thereby allowing one to successfully page a user terminal that is inside such a structure or area. Preferably, the paging channel message is formed using an auxiliary Walsh sequence of 65536 chips in length, and the data rate is less than 10 bps. |
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