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:
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< 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。