Packet buffer management

专利名称：Packet buffer management发明人：Lu, Xiaolin申请号：EP00306184.3申请日：20000720公开号：EP1073251A3公开日：20030910

专利附图：

摘要：A method for processing message data packets in a digital subscriber lineaccess multiplexer (DSLAM), for use in a digital subscriber line communications network.The DSLAM includes a DSLAM controller, which may be realized as a single-chip digitalsignal processor having its own on-chip random access memory (RAM). Flow control

operations are carried out by the DSLAM controller by pre-allocating a portion of itsRAM as a packet buffer memory pool, comprised of a selected plurality of minimum-sizememory blocks. Each received message data packet causes the allocation of a packetbuffer within memory pool as a data structure having a valid data pointer and a data sizevalue. Sufficient memory space is allocated for the packet buffer payload and itsexpected protocol headers and tails; if necessary, the packet buffer may be allocated inthe memory pool by way of a linked list of packet buffer entries. The message datapacket is processed through a series of protocols 58, 59, 60, both to and from theapplication level, by adding, deleting, and modifying header and tail information, primarilyby modification of the valid data pointer and data size value fields, and without recopyingthe message data itself. De-allocation 70 of the packet buffer is carried out so as toautomatically merge contiguous non-allocated memory blocks with one another, thusavoiding fragmentation of the memory pool.

申请人：Texas Instruments Incorporated

地址：7839 Churchill Way, Mail Station 3999 Dallas, Texas 75251 US

国籍：US

代理机构：Potter, Julian Mark

更多信息请下载全文后查看