When planning data relocation, which of the following methods can not only avoid large fluctuations in network quality, but also facilitate network engineering implementation? (Multiple choices)
A. Through the evaluation of the original network frequency planning, if it is found that there are major problems that cannot meet the needs of this relocation and expansion, and seriously affect the network quality, re-plan the frequency of the entire network or re-plan some areas as needed
B. Use the original frequency planning, and adjust some frequencies or re-plan the frequency of the whole network according to the needs after the relocation
C. Inherit the L AC and CI of the original network during relocation planning, and use all the planning data of the original network
D. When planning the relocation, inherit the original network LAC and re-plan the Ccorrect
E. When planning BSIC, shift the NCC if the original network is NCC is 0, 1, 2, change 0-> 3, 1->4, 2-> 5, and BCC remains unchanged
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