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Tham khảo tài liệu the tribes engine networking modelor, kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | The TRIBES Engine Networking Model or How to Make the Internet Rock for Multi-player Games by Mark Frohnmayer and Tim Gift Mark.Frohnmayer@Dynamix.com Tim.Gift@Dynamix.com Abstract This paper discusses the networking model developed to support a real-time multi-player gaming environment. This model is being developed for TRIBES II and was first implemented in Starsiege TRIBES a multi-player online team game published in December 98. The three major features of this model are support for multiple data delivery requirements partial object state updates and a packet delivery notification protocol. Overview Starsiege TRIBES supports two modes of play single player or multi-player over a LAN or the Internet. The multi-player mode supports up to 128 human or AI controlled players in a single game. Performance over the Internet drove the design of the networking model. The model supports low end modem connections and is designed to deal with low bandwidth high latency and intermittent packet loss. The model deals primarily with the delivery of data and a key concept is the classification of delivery requirements. All data is classified into one of several requirement categories and the design of each component in the model centers around meeting those requirements. We organize transmitted data as follows 1. Non-guaranteed data is data that is never re-transmitted if lost. 2. Guaranteed data is data that must be retransmitted if lost and delivered to the client in the order it was sent. 3. Most Recent State data is volatile data of which only the latest version is of interest. 4. Guaranteed Quickest data is data that needs to be delivered in the quickest possible manner. The networking model is divided into three major components as shown in Figure 1 1. A Connection Layer that deals with notification and delivery of packets between client and server. The features of this layer along with a stream class provide the general infrastructure on which the other layers are built.
