COMPRESSION METHOD FEATURING DYNAMIC CODING FOR WIRELESS COMMUNICATION IN WIRELESS NETWORKS

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

14/932,636

專利證號

US 9,967,774 B2

專利獲證名稱

COMPRESSION METHOD FEATURING DYNAMIC CODING FOR WIRELESS COMMUNICATION IN WIRELESS NETWORKS

專利所屬機關 (申請機關)

國立交通大學

獲證日期

2018/05/08

技術說明

一種具動態編碼之無線網路傳輸壓縮方法，係用於傳輸一封包至用戶端，透過無線接入點可將所有傳送給用戶端的封包切成固定長度的資料區塊，並將每個資料區塊的重複次數進行統計為每個重複的區塊建立霍夫曼編碼，以代表相對應資料區塊的編碼。因此，在傳送封包前會先進行切塊並且比對是否有重複的資料區塊已被編碼，並將編碼的封包以及使用的編碼進行傳送，而當重複區塊的編碼資訊在傳送給一個特定的用戶端時，也同時會被相同傳輸範圍內的其他用戶端接收到，因此其他用戶端也可以直接儲存此重複區塊以及其編碼，並還原原始的重複區塊內容。 A method of dynamic coding scheme to compress wireless communication in wireless networks. Access point (AP) will divide a packet into several chunks of fixed-length and record the repeat time of every type of chunk to encode the redundant chunks. AP sorts the repeat times of all chunks and establishes Huffman code. Every Huffman code represents a corresponding encoded chunk. After the Huffman code established, AP will encode the redundant chunks in every packet by replacing them with the corresponding Huffman codes, and send the encoded packets to the client and the corresponding Huffman codes of the redundant chunks which have not been sent before. After receiving the encoded packets, the client will check the cached Huffman codes and decode the encoded packets to recover the original ones. The Huffman code of every redundant chuck does not need to be sent every time for different clients since other clients may overhear the Huffman codes not intended sending to them.

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