Paging Messages
Definition: The signals sent on the paging channels to either convey system overhead or signaling messages or to notify a mobile that it is being paged.
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© 1999 DR. ERNEST SIMO - SPACE2000
Paging Messages
Application: The paging channels carry two different types of messages. One type is the signaling or overhead, control, and supervision messages and the second type is the signal sent to mobiles to notify them that they are being paged. The paging channels are the primary means of sending signaling messages to the mobile subscribers. These signaling messages are discussed under a separate topic entitled Signaling Messages.
The paging messages to a mobile are scrambled for privacy using a paging long code mask. The mobile receiver is able to generate a replica of the scrambling signal by appropriately setting the mask of its long code generator. The mobile is able to set the appropriate 42-bit mask by knowing the paging channel number and the offset of the pilot code used by its current base station. All messages to mobiles on a certain paging channel are scrambled in the same way. A mobile being paged is addressed or identified by at least the first 24 binary bits of its 34-bit Mobile Station Identification Number (MIN), which is the binary representation of its 10-decimal-digit telephone number. The length of the body of the paging message is specified in the message. The maximum length of the paging messages is 1184 bits.
The paging channel can operate in either the continuous or slotted modes. The purpose of the slotted mode is to allow the mobile to power-down some of its receiver circuitry to conserve battery power.
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© 1999 DR. ERNEST SIMO - SPACE2000
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