In long-term evolution-advanced (LTE-Advanced) networks, a local IP access (LIPA) mechanism allows packets to be routed locally between home eNodeBs (HeNBs) without being passed back to the core network. When a user equipment (UE) communicates with another UE through LIPA and hands over to an eNodeB (eNB), lots of unnecessary message exchanges are required to release and reestablish bearers between HeNB and eNB. To reduce the handover costs, we propose a bearer reservation with preemption (BRP) scheme to reserve bearers instead of releasing bearers for handover sessions. To ensure that normal sessions are not affected by the reserved bearers, the reserved bearers are preemptible by normal sessions. Results of performance evaluation show that, in most cases, more than 50% of message exchanges can be reduced by the BRP scheme.
All Science Journal Classification (ASJC) codes
- Automotive Engineering
- Aerospace Engineering
- Electrical and Electronic Engineering
- Applied Mathematics