Research On The Key Technologies For Resource Management And Control In Optical Grid

With the development of communications technologies, network services are developing toward the large-scale computing services and data-intensive applications. Grid is an application system for the next generation Internet. It solves the resource sharing and coordination problem among dynamic, distributed virtual organizations. Optical network can satisfy the requirement of information transfer and data exchange for grid with its low cost bandwidth, intelligent control and management, and transmission reliability. Optical grid is a combination of grid applications and optical network technologies. It treats network as one of grid resources among virtual organizations to provide dynamic, controllable and comprehensive optical network services for user in standard and uniform grid architecture.The key technologies for resource management and control in optical grid are studied in this thesis, and the main innovations are listed as follows:1) The architecture of optical grid is investigated and a model for service-oriented optical grid is proposed, in which grid application resources and grid network resources are regarded as peer entities, and they are abstracted and encapsulated to provide administrable, controllable, sharable and schedulable services. The management of service provisioning process and the interworking between the function entity and the resources are provided to construct the optical grid system with distributed heterogeneous resources.2) The resource allocation in optical grid is investigated and a load balance based parallel resource scheduling scheme is proposed. This scheme enable optical network to establish distributed connection between multi sites, i.e. realize parallel function of handling for grid application. Proposed parallel scheduling scheme supports co-allocation for both application resources and network resources, and enables the load to evenly distribute on the whole network. Simulation results show that proposed scheme successfully reduces service blocking probability and enhances the network resource utilization as well.3) The job scheduling in optical grid is investigated and a sliding time window based two phase scheduling algorithm is proposed for advanced reservation service. Propose scheme implements two phase scheduling, the first phase try to allocate the earliest start time for request within its time window. If the first phase fails, the second phase invokes four algorithms for re-optimization. Proposed scheme avoids the time overlap between multi requests and distributes the load to the whole network. Proposed scheme is designed for the future grid applications by taking advantage of both time window flexibility and resource availability. Simulation results show that this scheme successfully reduces service blocking probability and enhances network throughput.4) A test-bed for optical grid with distributed heterogeneous resources is constructed and the project of software and hardware are designed, in which the key technologies for architecture, service provisioning process, and resource management are validated. A QoS-aware lightpath provisioning scheme and a Grid-PON based parallel data-push scheme is proposed based on the test-bed. The QoS-aware lightpath provisioning scheme solve the problem of low network resource utilization in conventional optical grid network, and the scheme is realized by enabling an end-to-end lightpath to be employed by multi grid users simultaneously during their execution time according to their dynamic requests. Grid-PON based parallel data-push scheme proposed a solution of extending optical grid system for individual customer, and the experiment results show that parallel data-push scheme can effectively reduce transmission time and enhance network performance.