Chan, Anthony Hing-HungAnthony Hing-HungChanHe, N.Xiong, C.Zhu, L.2022-06-222022-06-222018-04-10https://repository.sfu.edu.hk/handle/sfu/3472United States Patent No.: 9,942,928Embodiments of the present invention provide a routing method between base stations, a serving gateway, and a base station, where the method includes: receiving, by a first serving gateway, a first user data packet of first UE sent by a first base station, and determining, according to the first user data packet, whether the first serving gateway serves both the first UE and second UE, where the second UE is a communication peer end of the first UE; and if the first serving gateway determines that the first serving gateway serves both the first UE and the second UE, triggering, by the first serving gateway, the first base station to acquire first routing information required for direct communication with a second base station, and triggering the second base station to acquire second routing information required for direct communication with the first base station.entechnical documentation