The sporadically deployed BSs/APs to the mobile nodes. To reduce the delay of packet delivery to a mobile node which is out of the transmission range of a BS (e.g., connectivity lost due to high mobility), a cooperative packet delivery scheme based on carry-and forward mechanism is used . For such applications, are provided through public wireless networks base stations (BS)/access points (AP) sporadically deployed across the roads act as the gateways between mobile nodes and other terrestrial networks (e.g., Internet) for data communication. For time-sensitive applications, a mobile node may be able to receive information in a timely manner only if it is within the transmission range of a BS and connected to the BS for a sufficient amount of time. A mobile node, which is currently connected to a BS, can help the BS to forward packets to other mobile nodes until the packets reach their destinations. This is an example of hybrid wireless networking model because it uses communications among mobile nodes and BSs as well as communications among mobile nodes. Different from the above works, in this study, a cooperative packet delivery scheme in a hybrid wireless networking scenario. In the scenario under consideration, a base station has packets to transmit to a mobile node which may not be in the transmission range of the BS. To reduce the delay of packet delivery, coalitions of mobile nodes can be formed. The social relationship among the mobile nodes can be exploited to reduce the complexity of coalition formation. Mobile nodes in the same coalition help each other to deliver packets sent from the BS to the destination mobile nodes. a social network analysis (SNA)-based approach to identify which mobile nodes have the potential to help other mobile nodes for data delivery in the same group or coalition. After the SNA based mobile node grouping is done, the mobile nodes in each group play a coalitional game to obtain a stable coalitional structure. The payoff of each mobile node is a function of cost incurred by the mobile node in relaying packets and the delivery delay for packets transmitted to this mobile node from a BS. A continuous-time Markov chain (CTMC) model is formulated to obtain the expected cost and packet delivery delay for each mobile node in the same coalition.