以代理人為基礎之主動式網路服務合成與部署策略

An Agent-Based Framework for Service Composition and Deployment in Active Networks

高伯睿(Bo-Rui Kao)

指導教授 ： 賴國華 博士

元智大學/資訊學院/資訊工程學系/碩士(2001年)

摘要

隨著網路的開放與普及，網路服務將更具動態性與異質性。傳統網路環境緩慢的標準制訂流程與硬體設備的封閉性，造成現有網路架構整合與部署新興的網路服務的困難。因此產生主動式網路的概念。主動式網路提出使網路具 “可程式化” 能力的構想，提供網路服務發展上的彈性與自主性。應用服務允許在節點內加入自訂之網路服務，網路節點不再只是被動傳輸裝置，更具有主動執行服務的能力。
基於行動代理人與膠囊 ( Capsule ) 行為的相似性，本論文嘗試將行動代理人導入主動式網路中，在傳輸之封包中以行動代理人概念取代原有膠囊 ( Capsule ) 之設計。相較於膠囊之運作，行動代理人通常更具智慧與自主性，不僅能處理執行碼之移動，也能夠控制本身之行為模式，即時對周遭的環境做出反應。並同時具有降低網路負載、非同步作業與離線作業等優點。因此本論文將發展以代理人為基礎之主動式網路架構，並對現有之服務合成與部署策略提出改進方案。同時，建構各類型之應用服務以驗證本架構之可行性。

關鍵字

主動式網路 ； 行動代理人 ； 服務合成 ； 服務部署

並列摘要

With the Internet proliferation, the tread of network services are dynamic and heterogeneity. However, the slow process of standardization and closed hardware in traditional network make it difficult for integrating new services into the current network infrastructure. To improve these problems, active networks that exploit programmable infrastructure to provide the flexibility and customizability of the service have been proposed. In such networks, customized services can be injected into network devices, which have active-executing abilities.
In this thesis, on the basis of the similarity between mobile agent and capsule behavior, we replaced capsule with mobile agent in active networks. Comparing with the capsule, mobile agents typically have more intelligence and customizability, which not only self-directed autonomy carrying out user-defined functions, but also reacting to the impulse of environment changes immediately. For this reason, we developed an agent-based active network with service composition and deployment strategies. Additionally, we also developed applications to verify this framework.

並列關鍵字

Active Network ； Mobile Agent ； Service Composition ； Service Deployment

參考文獻

[1]D.S. Alexander et al., “The SwitchWare Active Network Architecture,” IEEE Network Magazine, May/June 1998, pp.29-36

[2]D. Alexander, M. Shaw, S. Nettles, J. Smith, “Active Bridging,” In Proceedings of SIGCOMM 97, September 1997.

[3]S. Bhattacharjee, K. L. Calvert, and E. W. Zegura, “An Architecture for active networking, “ Proc. Int’l Conf. Network Protocols, 1998, pp.31-41.

[4]S. Bhattacharjee, K. L. Calvert, and E. W. Zegura, “Reasoning about Active Network Protocols, “ Proc. Int’l Conf. Network Protocols, 1998, pp.31-41.

[5]K. L. Calvert, et al., “Directions in Active Network,” IEEE Communications Magazine, October 1998.