Reducing Costs of LIPA Handover Through Bearer Reservation with Preemption

Chih Hao Lai, Hui Ling Chang, Meng Hsun Tsai, Chia Ying Lin

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number7801973
Pages (from-to)6428-6438
Number of pages11
JournalIEEE Transactions on Vehicular Technology
Issue number7
Publication statusPublished - 2017 Jul

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Automotive Engineering


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