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A Design of Bandwidth Allocation Scheme with Priority Consideration for Upstream Channel of Ethernet PON  

이호숙 (한국전자통신연구원 네트워크연구소 광가입자망연구부)
유태환 (한국전자통신연구원 네트워크연구소 광가입자망연구부)
문지현 (한국항공우주연구원 유도제어그룹)
이형호 (한국전자통신연구원 네트워크연구소 광가입자망연구부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.28, no.11A, 2003 , pp. 859-866 More about this Journal
Abstract
In this paper, we designed the bandwidth allocation scheme with priority consideration for upstream channel access of EthernetPON. The objective of our scheme is to control the multi services in more effective way according to their CoS(Class of Service) or QoS(Quality of Service). The designed scheme considers transmission priority in the both side of OLT and ONU. In the OLT's view, the Two-step scheduling algorithm is applied with which we can support multiple bandwidth allocation policies simultaneously, i.e. SBA for the time-sensitive, constant rate transmission services and DBA for the best-effort services. This Two-step scheduling algorithm reduces the scheduling complexity by separating the process of transmission start time decision from the process of grant generation. In the ONU's view, the proposed scheme controls 8 priority queues of the 802.1d recommended 8 service classes. Higher priority queue is serviced in prior during the allowed GATE time from OLT. The OPNET modeling and simulation result compares the performance of each bandwidth allocation policy with SBA or DBA only approach.
Keywords
PON; Ethernet PON; SBA; DBA;
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  • Reference
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2 IEEE 802.1d Draft Document for 802.1d, May. 2001
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