Peer To Peer Multimedia Streaming Essay Example | Topics and Well Written Essays - 2500 words

Peer To Peer Multimedia Streaming - Essay Example However, the increase in the number of viewers, along with the rise in a number of other online applications, has made this architecture ineffective because of bandwidth bottleneck issues. One solution introduced to solve this problem is peer to peer (P2P) technology, wherein peers automatically relay streams to other peers. The P2P network they are connected to performs an algorithm that helps peers ï ¬ nd a relay for a speciï ¬ ed stream to connect to. In multimedia streaming service, the important factors to observe are playing time and network bandwidth utilization. The purpose of this report is to present a solution to these issues. The proposal is to utilize P2P caching service that exploits the proximity of connected clients, i.e. the temporal and spatial locality of cached streams to the clients. In this scheme, connected peer clients not only receive multimedia streams from a server but also send cached streams to peer clients like a proxy server upon request. One P2P technology that can support this architecture is called inter-overlay optimization. Figure 1 shows the different approaches employed in multimedia streaming starting from the centralized client-server topology to decentralized schemes, which includes IP multicast and P2P solutions. P2P can be further sub-divided into mesh-based, tree-based and hybrid overlays. Each peer can accept media data from multiple parents as well as provide services to multiple children (both parent and child are relative terms in place of master-slave relationship). The advantages of this solution are high resource utilization and fast discovery of fresh peers in a single mesh due to gossiping. The disadvantages are: quality of service cannot be guaranteed due to gossiping among peers and large buffer space needed to reduce the impact of autonomy of peers (in a dynamic environment). Example applications are Coolstreaming, Promise, and GNUStream. Each peer communicates only with one parent (per overlay) and provides service to a number of children such that a â€Å"tree† topology is always maintained (in an overlay). The advantages of this solution are: closely resembles original IP multicast ideas and low management overhead.

Chinese and Japanese Response to Western Imperialism Essay

Chinese and Japanese Response to Western Imperialism - Essay Example Chinese efforts to strengthen it politically, militarily and economically also failed. China would become dominated by unequal treaties of foreign powers. Japan would become a major world power able to compete against the European countries. Japan in the seventeenth and eighteenth century was undergoing a period of isolation in which European missionaries and traders were highly restricted in their movements. Under American pressure in 1853, Japan would open its ports and sign unequal treaties with European powers. Japan began a series of reforms known as the Meiji Restoration in which the feudal system was abolished, economic reforms were launched, military was modernized and Western political concepts were applied to the country. The Meiji restoration would transform Japan into a major industrialized and economic power which was capable of competing with the West. Japan would use its modern military to inflict crushing defeats on Russia and China. During World War II, Japan would e mbark upon a policy of conquering several South East Asian countries before being defeated by the United States. Under the American occupation, Japan would again rebuild itself into a pacifist but economically powerful country. China in the nineteenth century suffered from strife, corruption, stagnation and various internal problems. The Chinese also had to deal with foreigners who were now taking control of many territories in Asia. The Chinese monarchy was arrogant in its dealings with Europeans. Trade between Europe and China brought a series of conflicts in which China was humiliated and defeated. As trade increased between European traders and Chinese, this led to increased hostility between European governments and China.