Changes between Version 1 and Version 2 of U-Connect

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Timestamp:
02/10/2010 07:41:37 PM (7 months ago)
Author:
arvindkr
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  • U-Connect

    v1 v2  
    55= Protocol Overview = 
    66U-Connect is an unified protocol to address both the symmetric and asymmetric asynchronous neighbor discovery problems. 
    7 Consider a protocol in which a node picks a prime number '''p''' and stays active for '''1''' every '''p''' slots. Any two primes are by definition 
     7Consider a protocol in which a node picks a prime number ''p'' and stays active for ''1'' every ''p'' slots. Any two primes are by definition 
    88relatively prime with each other. Hence, two nodes choosing different primes will discover one another. If the nodes choose the same pair of 
    9 primes, discovery can still be ensured by each node staying active for slightly longer than half the prime period '''p'''. 
     9primes, discovery can still be ensured by each node staying active for slightly longer than half the prime period ''p''. 
    1010 
    1111 
    12 The protocol has been implemented on a custom designed light-weight, small and rechargeable mobile sensor-networking hardware platform called '''FireFly-Badge'''. In the implementation, the node listens at the slots that are multiples of '''p'''. This operation is fundamentally "Low 
    13 Power Listening" (LPL), where the listen period is 
    14 '''p''' slots.  The node transmits continuously for ''' {p + 1}/2''' slots for every hyper-cycle. This periodic transmission 
    15 is called "Low Power Transmit" (LPT). Clustering the 
     12The protocol has been implemented on a custom designed light-weight, small and rechargeable mobile sensor-networking hardware platform called '''FireFly-Badge'''. In the implementation, the node listens at the slots that are multiples of ''p''. This operation is fundamentally ''Low 
     13Power Listening'' (LPL), where the listen period is 
     14''p'' slots.  The node transmits continuously for ''{p + 1}/2'' slots for every hyper-cycle. This periodic transmission 
     15is called ''Low Power Transmit'' (LPT). Clustering the 
    1616transmission slots in this fashion, enables our implementation 
    1717to spread the packet transmission over multiple slots, thereby enabling much lower slot sizes.