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1.发明申请公开(公告)号：US20070121639A1
公开(公告)日：2007-05-31
申请号：US11564111
申请日：2006-11-28
IPC分类号： H04L12/56
CPC分类号： H04L1/004 , H04L1/1812
摘要： The invention concerns a data packet retransmission arrangement having a retransmission buffer, a counter, a forward error correction device and control logic. The retransmission buffer stores recently transmitted data packets. The counter keeps track of the number of retransmission requests received for a data packet (211). If this number is below a first integer value K, the data packet is retransmitted (212, 213). If this number is equal to or above the first integer value K, the forward error correction device calculates N forward error correction packets on L-1 recently transmitted data packets plus the data packet to be retransmitted (211), N being a second integer value equal to or larger than zero, and L being a third integer value equal to or larger than 1. In the latter case, the data packet is retransmitted together with the N forward error correction packets (214).
摘要翻译： 本发明涉及具有重传缓冲器，计数器，前向纠错装置和控制逻辑的数据分组重传布置。 重发缓冲器存储最近发送的数据分组。 计数器跟踪接收到的数据包的重发请求数（211）。 如果该数字低于第一整数值K，则重发数据分组（212,213）。 如果该数量等于或大于第一整数值K，则前向纠错装置在L-1最近发送的数据分组加上要重发的数据分组（211）上计算N个前向纠错分组，其中N为第二整数值 等于或大于零，并且L是等于或大于1的第三整数值。在后一种情况下，数据分组与N个前向纠错分组（214）一起重传。
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公开(公告)号：US08677220B2
公开(公告)日：2014-03-18
申请号：US13129015
申请日：2009-11-24
CPC分类号： H04L1/0057 , H04L1/12
摘要： The present invention relates to a new error control paradigm in a packet switched network that is particularly advantageous for multicast transmission.A transmission Status Vector TSV (T) is updated at the sender side whenever a new outgoing data packet (Dj−1) is scheduled for transmission. A corresponding Reception status Vector RSV (R) is similarly updated at the receive side whenever a new incoming and correctly indexed data packet (Dj−1) is validly received.As soon as a missing or corrupted data packet (Dj) is detected, the update of the RSV is suspended. A request is then sent to the sender to get the current Tsv's value, or a part thereof. The erroneous data packet is then recovered from the current TSV's value (Sk,m), from the lastly updated RSV's value (Sj−1), and from otherwise validly received data packets (Dj+1, . . . , Dk).The present invention more specifically relates to a transmitting unit (100) and a receiving unit (200) implementing that paradigm, and correspondingly to a method for protecting a flow of indexed data packets against data lost or data corruption, and a method for recovering a missing or corrupted data packet within a flow of indexed data packets.
摘要翻译： 本发明涉及分组交换网络中对组播传输特别有利的新的错误控制范例。 每当新的输出数据分组（Dj-1）被调度用于传输时，在发送器侧更新传输状态向量TSV（T）。 无论何时有效地接收新的传入和正确索引的数据分组（Dj-1），在接收侧类似地更新对应的接收状态向量RSV（R）。 一旦检测到丢失或损坏的数据包（Dj），则RSV的更新被暂停。 然后，向发送方发送请求以获得当前的Tsv值或其一部分。 然后从最后更新的RSV值（Sj-1）和其他有效接收的数据分组（Dj + 1，...，Dk）从当前TSV值（Sk，m）恢复错误的数据分组。 本发明更具体地涉及实现该范例的发送单元（100）和接收单元（200），并且相应于用于保护索引数据分组的数据流免遭数据丢失或数据损坏的方法，以及用于恢复 在索引数据包流中丢失或损坏的数据包。
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公开(公告)号：US20110258519A1
公开(公告)日：2011-10-20
申请号：US13129015
申请日：2009-11-24
IPC分类号： G06F11/00
CPC分类号： H04L1/0057 , H04L1/12
摘要： The present invention relates to a new error control paradigm in a packet switched network that is particularly advantageous for multicast transmission.A transmission Status Vector TSV (T) is updated at the sender side whenever a new outgoing data packet (Dj−1) is scheduled for transmission. A corresponding Reception status Vector RSV (R) is similarly updated at the receive side whenever a new incoming and correctly indexed data packet (Dj−1) is validly received.As soon as a missing or corrupted data packet (Dj) is detected, the update of the RSV is suspended. A request is then sent to the sender to get the current Tsv's value, or a part thereof. The erroneous data packet is then recovered from the current TSV's value (Sk,m), from the lastly updated RSV's value (Sj-1), and from otherwise validly received data packets (Dj+1, . . . , Dk).The present invention more specifically relates to a transmitting unit (100) and a receiving unit (200) implementing that paradigm, and correspondingly to a method for protecting a flow of indexed data packets against data lost or data corruption, and a method for recovering a missing or corrupted data packet within a flow of indexed data packets.
摘要翻译： 本发明涉及分组交换网络中对组播传输特别有利的新的错误控制范例。 每当新的输出数据分组（Dj-1）被调度用于传输时，在发送器侧更新传输状态向量TSV（T）。 无论何时有效地接收新的传入和正确索引的数据分组（Dj-1），在接收侧类似地更新对应的接收状态向量RSV（R）。 一旦检测到丢失或损坏的数据包（Dj），则RSV的更新被暂停。 然后，向发送方发送请求以获得当前的Tsv值或其一部分。 然后从最后更新的RSV值（Sj-1）和其他有效接收的数据分组（Dj + 1，...，Dk）从当前TSV值（Sk，m）恢复错误的数据分组。 本发明更具体地涉及实现该范例的发送单元（100）和接收单元（200），并且相应于用于保护索引数据分组的数据流免遭数据丢失或数据损坏的方法，以及用于恢复 在索引数据包流中丢失或损坏的数据包。
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公开(公告)号：US20070223475A1
公开(公告)日：2007-09-27
申请号：US11626345
申请日：2007-01-23
IPC分类号： H04L12/56
CPC分类号： H04N5/4401 , H04L1/1642 , H04N5/50 , H04N7/17318 , H04N21/23106 , H04N21/25891 , H04N21/44222
摘要： An access node (101) according to the invention is able to multicast a plurality of video channels to subscribers, and to cache N of these video channels. To select the N video channels for caching, the access node (101) determines for each video channel a weighted sum of the zapping rate rk to channel k and the channel popularity πk. The N video channels that have the highest values for this weighted sum are cached by the access node (101).
摘要翻译： 根据本发明的接入节点（101）能够将多个视频信道多播到用户，并且缓存这些视频信道的N个。 为了选择用于高速缓存的N个视频信道，接入节点（101）针对每个视频信道确定向信道k的转换速率r k k和信道流行度pi＆lt; SUB>。 对于该加权和值具有最高值的N个视频信道由接入节点（101）缓存。
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