With development of short range communication technology,P2P(Peer to Peer) networks are pervasive,and the nav‐com user terminals become popular.The application of P2P networks provide the new method to improve positioning performances of user terminals.Compared to conventional A‐GNSS augmentation,P2P aiding is completed by user terminals each other,which don’t depend on preinstalled communication infrastructures ( e.g.,mobile communication base stations).In P2P networks,aiding sources are closer to aided users than conventional base stations aiding.The advantage can provide more accurate and reliable augmentation information,so the user terminals can get better augmentation performances.Now there are some groups research P2P aiding,but their topic is the mean acquisition times.But the acquisition sensitivity is very important metric for both military users and civil users.The paper researches performance of acquisition sensitivity in P2P networks.The aiding peer can receive both GNSS signals and the communication signals of aided peer,.According to the real‐time measurements of carrier phase and frequency offset,the aided peer can get real‐time local frequency offset values.Based on these values,the peer can extend coherent integration time and improve the acquisition sensitivity.Simulation show that the aided user can complete coherent integration of several seconds,and the non‐aided user only do for hundreds of milliseconds.The aided terminal can reliably work in low signal‐noise ration,1even in 10dB?Hz condition.The requirement of communication rate is less than 1kps.