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This paper proposes a handover scheme using uplink and downlink channel quality information in order to improve the uplink channel performance during a handover process. The proposed scheme has two main features. First, the proposed scheme adopts the scanning process without an association process in order to obtain an uplink channel quality. Second, it designs the handover triggering and decision...
Short message service (SMS) has two main features, namely small-sized SMS packet and high acceptable-delivery delay. For these features, this paper proposes an efficient transmission scheme for SMS in IEEE 802.16 systems. In order to reduce a message overhead, the proposed scheme exploits the existing connection instead of generating a new connection. In addition, it adopts the piggyback scheme with...
IEEE 802.16e specification adopted that a target base station (BS) transmits Fast_Ranging_IE() to the upcoming handover MS to reduce the handover interruption time. However, the handover interruption time can be increased if the MS fails to receive Fast_Ranging_IE() because the channel release time between the MS and the serving BS is increased more than the estimated handover time due to the queuing...
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