Shu (Marloon) Wang

Evolving Random Access Channel What Is The Next for Mobile System Design? How Much Feedback Is Enough for MIMO? How to Broadcast Multimedia Contents? Interference Cancellation: A Short Overview Location Based Services for Mobiles From Chair's notes, there are more than 40 work or study items proposed for enhancing LTE Advanced or  both LTE-Advanced and HSPA. They will be completed by September 2012. Further Enhanced Non CA-based ICIC for LTE LTE Carrier Aggregation Enhancements Study on Coordinated Multi-Point Operation for LTE Study on Enhanced Uplink Transmission for LTE Study on further Downlink MIMO enhancements for LTE-Advanced Study on Further Enhancements to LTE TDD for DL-UL Interference Management and Traffic Adaptation Coordinated Multi-Point Operation for LTE Provision of low-cost MTC UEs based on LTE Proposed SI on LTE Coverage Enhancements Improvements to LTE Relay Backhaul Study on LTE Device to Device Discovery and Communication - Radio Aspects N

One key feature of any mobile communication system is to provide a mobility mechanism for mobiles to do fast and seamless switching between serving cells. There are many different handover mechanisms for achieving this goal. They include soft handover, which is mostly used for voice services, and hard handover, which is designed for data services. Hard handovers can be further classified as network-controlled handovers and mobile-based handovers. The interesting thing is if you look at the basic handover or handoff procedures I will explain in the next, you may feel a long-time debate on which entity , base stations or mobiles, should control handover or handoff. Traditionally there is no standardized direct connection between two BTS's, even they both belong to the same BSC. Therefore, there usually are a long outage for a mobile do hard handover. For example, the default forward traffic channel MAC handover scheme of CDMA2000 EV-DO Rev. 0 usually results in 100~200ms outage.