Fountain Code Transmission in Dual Connectivity Based on Partial Overlapped Data
Wenyan Ding, Pinyi Ren, Qinghe Du · 2019
The highly-intensive networking in 5G makes it possible that a user may in the coverage of multiple base stations. Then the dual connectivity technique can be widely applied. Meanwhile, in senses using multicast application, the fountain codes can reduce lots of retransmission of the missing packets. The receiver can recover all of the message as long as the received packets is enough. The proposal that applying fountain codes to dual connectivity faces two main challenges, the redundance of the receiving package introduced by fountain codes and the data transmission pressure while offloading message between stations in dual connectivity. In this paper, a new scheme of fountain codes transmission in dual connectivity is proposed. When allocating data for dual connectivity base stations, the scheme sets up a partially overlapped data to reduce the offloaded data between stations. In the experiment, we first adjust the data groups selection probability of overlapped and non-overlapped part when fountain coding. And then, it is found that the overlapped part can be recovered in advance at the receiver, which optimizes the robust soliton distribution function. The simulation results validate the scheme above that the decoding overhead can be greatly reduced.