Bandwidth Guaranteed Polling (BGP) in

computing Computing is any goal-oriented activity requiring, benefiting from, or creating computing machinery. It includes the study and experimentation of algorithmic processes, and development of both hardware and software. Computing has scientific, e ...

and

telecommunication Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that fe ...

s is a dynamic bandwidth allocation algorithm for

Ethernet Ethernet () is a family of wired computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN). It was commercially introduced in 1980 and first standardized in 198 ...

passive optical networks designed by Maode Ma et al. at the

National University of Singapore The National University of Singapore (NUS) is a national public research university in Singapore. Founded in 1905 as the Straits Settlements and Federated Malay States Government Medical School, NUS is the oldest autonomous university in the c ...

. This is an instance of an algorithm that allocates bandwidth based on fixed weights. BGP divides a window of time into fixed-sized slots, a number of which are allocated to each

Optical Network Unit Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultraviole ...

(ONU). The number allocated depends upon the ONU customer's service level agreement (SLA). If an ONU does not wish to use its entire allocated time slot, it may inform the OLT about this. The OLT may then decide to reallocate the remaining time slot to another ONU which does not have an SLA. The BGP algorithm may not be entirely compatible with the MPCP standard. This is because the MPCP does not provide any way for the ONU to inform the OLT about the fraction of the time slot that it wishes to use.

References

M. Ma, Y. Zhu, T. H. Cheng, "Bandwidth Guaranteed Polling MAC Protocol for Ethernet Passive Optical Networks", INFOCOM 2003.
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