发明授权
US06185607B2 Method for managing network data transfers with minimal host processor involvement
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以最少的主机处理器参与来管理网络数据传输的方法
- 专利标题: Method for managing network data transfers with minimal host processor involvement
- 专利标题(中): 以最少的主机处理器参与来管理网络数据传输的方法
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申请号: US09085395申请日: 1998-05-26
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公开(公告)号: US06185607B2公开(公告)日: 2001-02-06
- 发明人: Burton B. Lo , Anthony L. Pan , Pauline Cheng
- 申请人: Burton B. Lo , Anthony L. Pan , Pauline Cheng
- 主分类号: G06F15167
- IPC分类号: G06F15167
摘要:
A method for managing data transfers with minimal host processor involvement. Data is transferred between a peripheral device coupled to a host computer and a network device over a high performance bus. In one exemplary embodiment, data is transferred over a bus utilizing the IEEE 1394 communication protocol and a network utilizing the Ethernet communication protocol. The novel data transfer method advantageously minimizes the involvement of the host computer's processor in the management of data transfers, thus maximizing the host processor's availability for performing other computations. Specifically, to transfer data from the peripheral device to the network, the host processor generates a data pointer table and sends it to the network device. A processor in the network device then takes over data transfer management, using information in the data pointer table to locate and transmit the designated block of data from the peripheral device to the network. In another embodiment, the present invention determines whether the size of a data block to be transferred exceeds the maximum packet size for the relevant communication protocol used by the bus or the network. If such a limit exists and is exceeded, the data pending transfer is divided into multiple packets, such that each packet conforms to the maximum packet size of the limiting protocol. Then, the smaller packets are transmitted iteratively until the entire data block is transferred. As such, the present invention eliminates the incompatibility problem posed by the differences in packet sizes among different communication protocols.
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