Research On Personal Information Exchange System For Communication Terminal And Its Application

Information exchange is one of the most important application of Internet technologies, which can be divided into remote interactions and local interactions. Information retrieval and resource downloads have been on the focus of academic and industry, and data exchange by AT command has received more and more attention. How to retrieve useful information from the mass of information quickly and balance load of node for reource downloads,as well as achieve data exchange based on AT command is of great significance.So the subject has studied document retrieval technology deeply, and has proposed improved multi-threaded downloads mechanism, and has achieved data exchage based on AT command.The main innovation of topics is as follows:1. For slow data process speed, low recall and precision rate in document retrieval, a two-layer MapReduce documents classification method is provided, which makes full use of parallel processing of MapReduce to get retrieval results quickiy and effectively.2. For limited uplink/downlink number in peer-to-peer network caused by ADSL network uplink/downlink bandwidth and resource allocation singelly, proposed the approach called dynamic allocation strategy of data block sliding window and adaptive selection strategy of resource node. Experimental results show that: 1. Dynamic allocation strategy of data block sliding window is able to solve the problem of low bandwidth utilization of ADSL downlink, avoiding node overload caused by invalid data request. 2. Adaptive selection strategy of resource optimizes the resource download environment, balancing the load of nodes to improve the transmission efficiency.3. Data exchange method based on AT command, which is to use the AT command congfigured file to achieve data exchane between mobile terminal and computer. Using this method can reduce workload to meet different needs of data exchanges.