US Patent 12126684 Publisher-subscriber message mapping

In an example implementation consistent with the features disclosed herein, publisher-subscriber message mapping is performed. A message is received from a publisher, with the message including a first topic. The first topic includes a gateway identifier of a gateway for the publisher. The gateway identifier is then mapped to a user identifier. The first topic of the message is modified to a second topic by replacing the gateway identifier with the user identifier. The message is then sent to a subscriber that is subscribed to the second topic.