ios – How one can hold websocket connection whereas getting into background in swift?

i am implementing real-time chat utilizing websocket protocol.

It makes use of the apple websocket framework to maintain the reference to the server,

however when it enters the background, the connection is disconnected.

I need to hold connection even when it enters the background.

   personal var websocket: URLSessionWebSocketTask?

func connectWebsocket() {
   let session = URLSession(
            configuration: .default,
            delegate: self,
            delegateQueue: OperationQueue()
        )
        
        let url = URL(string: "ws://URL...")
        
        webSocket = session.webSocketTask(with: url)
        webSocket?.resume()
}

I need to hold connection even when it enters the background.

Is there any strategy to hold the connection alive?