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Timers value

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  • #69805
    Rakesh solanki

    Can any one explain Timers & their values in GSM

    Wallis Dudhnath

    GSM, GPRS, 3G, 4G (LTE), etc.. is built around signalling and State/Entity
    Functions. As a result of a request an entity will move from one
    state to another in a well defined sequence. In order for this to happen
    timers must be used and supported. 3GPP has a lot of specified Timers that are required
    for the system to work in a well co-ordinated manner.

    Some example of GSM Timers

    – Call Setup – T3120, T3126, T3101, T3230, T310, T11, T10, T313, T3107
    – Call Clearing – T13, T3111, T3109, T3110
    – Handover – T3103, T8, T7, TQHO, T3121
    – GPRS – T3182, T3164, T3198, T3180, T3190, T3192, T3312, T3314, T3321
    – Miscellaneous – T3210, T3128, T3211, T3212, T3220

    Look at the extensive signalling that GSM, etc.. supports. This works because of the
    defined timers used for the supported messages.

    VBR/ Wallis Dudhnath

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