Concerning the problems including repetitive query, storage and processing in the process of complex event query processing in Internet of Things (IOT), an Event Sharing Mechanism (ESM) was proposed. Firstly, in order to realize the query and detection of complex events, a semantic event definition about IOT and semantic descriptions of event operators were presented. Secondly, research on the IOT ESM was done from the following three aspects: the definition of public subqueries, the design of public internal query structure and the sharing of event resources. Through rewriting the query expression, building the Directed Acyclic Graph (DAG) related to the query expression and using the improved Continuous, one of the parameter contexts, on each node to handle event streams, the sharing of public events' query, storage and processing was implemented. Finally, a Semantics Formal Query-plan Processing Model (SFQPM) based on ESM was also designed, which could process query expressions and predicates automatically, and fulfill the automation of complex event detection and processing. The simulation results show that, compared with the method based on BTree (Binary Tree), the proposed SFQPM has high efficiency and reliability in processing, and can process massive and real-time IOT event streams timely and efficiently. In addition, a case study was given to verify the effectiveness and feasibility of the proposed SFQPM.

For the issue that traditional vertical handover trigger mechanism cannot guarantee to provide the real-time highest data rate, a method which can make the best of network resources and can effectively avoid unnecessary handover was proposed. This paper introduced IEEE802.21 Media Independent Handover (MIH) standard，using Media Independent Information Service (MIIS) provided by MIH Function (MIHF) to get the parameters of candidate Wireless LAN (WLAN) which can cover the mobile terminal, calculate the maximum available data rate of the candidate WLAN using the acquired parameters, and compare the maximum available data rate of WLAN with 3G networks to make handover decision. And when higher data rate WLAN was detected, handover to it could be made timely. If the mobile terminal moved out of the WLAN coverage, handover back to 3G network was made. The simulation results show that the proposed algorithm can make more full use of network resources and avoid unnecessary handover effectively compared to traditional vertical handoff trigger mechanism.

Through the analysis of the LTE system in FPGA-based spatial multiplexing coding problem, and propose a implementation of a codebook-based precoding. According to the parameters of the upper informed carries on the table look-up in the mathematical table and the addition and subtraction relations table, the data of layer mapping first carries on coefficient multiplication, then add and subtract, thus this has replaced the complex matrix multiplication operation. Therefore this method can greatly reduce the complex matrix multiplication operation in the precoding procedure, and reduce the complexity of encoding process, improve the speed of the encoding operation. The experimental results indicate that the proposed algorithm can achieve a good system function.