公开(公告)号：US20240406023A1

公开(公告)日：2024-12-05

申请号：US18259707

申请日：2021-12-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hongbin Zou ,  Ming Kuang

IPC: H04L12/28 ,  H04L41/12

Abstract: This application relates to a cross-network-segment discovery method and system, and a routing device. The method includes: An electronic device A sends, to an electronic device B, a DLNA delivery message that includes a URL and an identifier of the electronic device B. The electronic device B plays content corresponding to the URL. After the electronic device A moves from an area A to an area B, the electronic device A disconnects from a routing device A, and connects to a routing device B. The electronic device A sends, to the routing device B, a first request message that includes a fixed multicast address. The routing device B forwards the first request message to the routing device A. The routing device A sends the first request message in a multicast mode within a range of a first multicast address. The electronic device B sends a first response message to the electronic device A by using the routing device A and the routing device B. The electronic device A discovers the electronic device B. In this way, cross-network-segment automatic discovery may be implemented, to provide convenience for a user and improve user experience.