Signaling Traffic
Definition: Control, overhead, or supervisory messages which are used in communications to manage the system configuration and flow of the primary message traffic.
Note: The control or signaling messages sent on the paging and Access Channels do not include the signals sent to and from a mobile notifying the mobile that it is being paged or notifying the system that the mobile is initiating a page.
See Paging Messages.
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Signaling Traffic
Application: The paging channels are the primary means of sending control messages to the mobile subscribers. There are two categories of paging messages. One category is called configuration messages. These messages, as their name suggests, send data to the mobiles which is needed to configure or reprogram the mobile equipment. The three message types in the configuration category are the system parameters message, the neighbor list message, and the CDMA channel list message. The system parameters message contains a large number of parameters needed to recognize the CDMA system and to configure the mobile equipment. The neighbor list message lists the PN pilot offsets and their search window sizes which the mobile should put in its neighbor set. The CDMA channel lists the center channel, from which the CDMA center frequency is derived, for each CDMA channel available.
The second category of paging messages is the access parameters message. This message contains the many variables needed to define how the mobile is to structure the signals it sends to the base station on the Access Channel and at what power levels these messages are to be transmitted. In IS-95, a scheme of message sequence numbers is used to assure that each mobile has the very latest versions of the paging messages without requiring that each paging message transmitted be completely demodulated by each mobile.
The Access Channel is the primary means of sending signaling traffic from a mobile to its base station. The Access Channel carriers several types of signaling messages in addition to the page origination and page response messages. These include registration, order, data burst, and authentication challenge response messages.
When a mobile is in the traffic mode, the signaling messages usually sent on the paging and Access Channels are sent on the traffic channels where they are time multiplexed with the primary voice traffic using the dim-and-burst or blank-and-burst formats. See Blank and Burst and Dim and Burst.
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