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Loop protection in NOKIA BTS

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    Ramajayam cyr

    what is the loop protection in NOKIA BTS please clearly explain any one

    Advanced thanking you

    Ramajayam cyr

    Please help me

    Did you know any body
    what is the loop protection in NOKIA BTS please clearly explain any one
    Thanking you


    Tell me more about loop protection, where do you see this information? hubmanager? trumanager?

    Loop protection used when you have a loop network.

    Do you have citytalk? ultrasite? DN2?


    Transmission network protection using loop topology


    Nokia Loop Protection is considered the most efficient way to protect traffic in a
    transmission network such as a GSM base station subsystem. In a live
    telecommunications network it is important to secure the network
    synchronisation and the centralised network management, in addition to the
    actual payload traffic, during any period of abnormal circumstances.
    For these reasons, Nokia Loop Protection protects

    . payload traffic
    . network synchronisation
    . network management connections.
    A transmission loop formed with Nokia elements consists of one loop master and
    several loop slaves. Usually the loop master is a transmission node whereas the
    loop slaves can be either transmission nodes, BTSs or a combination of both
    inside one loop.
    The loop principle is that the transmitted signal is always sent in both directions
    but the received signal must be chosen from only one direction. The loop master
    sends pilot bits on the basis of which the switching decision is made. Each
    individually protected slave station needs one pilot bit.
    Network synchronisation must also be ensured in a loop network and it follows
    the loop principle in a similar way. The synchronisation switching takes place
    independently from the pilot bits by having a master clock bit (MCB) and a loop
    control bit (LCB).
    Each network element decides individually from which direction the signal and
    the synchronisation will be received, and so it does not require any external or
    additional supervision for its decision.

    Nokia’s way of implementing loop protection is ultimately secure, providing very
    fast route switching that recovers the transmission connections instantly. Nokia
    loop protection is embedded and thus very fast. Nokia loop protection protects
    against failures, such as cable-cut, equipment failure, heavy rain and multipath
    fading, and against obstacles in the line-of-sight, such as cranes and growing
    Compared to an unprotected wireless network, Nokia loop protection increases
    site availability at least tenfold and prevents end-of-chain availability
    degradation. Further, it enables significant hop length increases without site
    availability sacrifices and helps minimise radio link antenna sizes.

    Ramajayam cyr

    Thank you mr dayanidhi
    your replay is very use full for me

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