Page 308 - 5G Basics - Core Network Aspects

1 Core network aspects

Figure 9-3 – Traffic adjustment procedure initiated by MPT-enhanced MUE
0-1) data packets of a large file are transferred from MPT-enhanced MUE_A to MPT-enhanced MUE_B
through the WLAN path and the 3G path simultaneously for a larger aggregated bandwidth;
2) MUE_A collects and analyses path performance parameters of the WLAN path and the 3G path, and
finds that the 3G path access becomes more congested;

3) MUE_A decides to shift some of the traffic from the 3G path to the WLAN path according the
comprehensive path assessment;

4-5) after the above procedures, the WLAN path balances some traffic of the 3G path for resource
optimization and timely delivery;
6) MUE_A detects the packet loss or damage event such as retransmission acknowledgment or the
RTO occurs of the WLAN path;
7) MUE_A decides to adjust the retransmitted traffic to the 3G path for better retransmission efficiency
based on a specific retransmission policy;
8-9) after the above procedures, MUE_A turns on the retransmission scheme. The service flow still
transmits through the WLAN path, but part of the retransmitted traffic is adjusted to the 3G path.
Data packets from the WLAN path and the 3G path are aggregated at the receiving end for upper
layer delivery.

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