TDD, downlink and uplink traffic use the same channel and separated by time space適合unsymmetrical業務,如網際網路資料業務lower speed support, e.g. up to 120Km/h, 因為TDD晶片處理速度跟不上TDD基站成本比FDD低,重要原因之一,TDD中,上下行資料共用同一頻率,更適合智能天線,loss減少,效率增加FDD, downlink and uplink
其實是一個架構的東西,主要有以下四個原則: 顯式調用HTTP方法:避免http方法的副作用,所謂一個蘿蔔一個坑,每種方法應該對應一種操作,而不該越界,例如,明明用了GET方法,卻又做了其他修改操作等,這就不是顯式調用了。所以在REST web服務中,對http方法進行了定義,該負責啥的負責啥。具體怎麼做呢,克服此常見問題的簡單方法是將請求 URI 上的參數名稱和值轉移到 XML 標記中。 這樣產生的標記是要建立的實體的 XML 表示形式,可以在 HTTP POST 的本文中進行發送,此
Policy 和 Policy Classes有助於我們設計出更加安全,有效率且具有高度彈性的“設計項目”。所謂Policy,是用來定義一個class或者class template的介面,該介面以下項目之一或者全部組成:內隱類型定義,成員函數,成員變數。template< class T >struct OpNewCreator{static T* Create() {return new T;}};template< class T >struct
Program Memory LayoutMemory is used for many purposes in a program. All memory looks the same to the processor: memory is just a big array of bytes, but programs partition this pool of bytes into different areas. Typically, a program will have the
1.A. Marold, P. Lieven, and B. Scheuermann, “Probabilistic parallel measurement of network traffic at multiple locations,” IEEE Network, vol. 26, no. 1, pp. 6 –12, Feb. 2012.challenge: when merging the observed traffic at multiple locations (where
Coupled Congestion Control for Multipath Transport Protocols [draft-ietf-mptcp-congestion-07]link:http://tools.ietf.org/html/draft-ietf-mptcp-congestion-07重要文獻:[1] Wischik, D., Raiciu, C., Greenhalgh, A., and M. Handley,"Design, Implementation and
utilities:1. neural control in dynamic routingM. Baglietto, T. Parisini, R. Zoppoli, “Distributed-Information Neural Control: the Case of Dynamic Routing in Traffic Networks”, IEEE Transactions on Neural Networks, May 2001, Vol. 12, No. 3, pp. 485 -5
How does XVCL work? Change is the heart of software maintenance, reuse and generally – software development. Therefore, by mastering change, we tackle some major challenges in software engineering.XVCL is a mechanism for change. Change plans in XVCL,
RTMPHTTPPort Number193580Video DeliveryRTMP server streams video bytes from any point of time according to client’s request. Good for long content videoHTTP is designed to progressive download videoCacheVideo is stored at flash player’s memoryVideo