Node and method for RAN congestion status handling

摘要

Example embodiments presented herein are directed towards a mobility management node and a communications node, and corresponding methods therein, for the handling of a RAN congestion status. The example embodiments presented herein allow for a means of providing an accurate RAN congestion status in an efficient manner.

主权项

1. A method, in a target mobility management node (MMN), for Radio Access Node (RAN) congestion status handling, the method comprising:
the target MMN receiving a first message associated with a wireless device; the target MMN, as a result of receiving the first message, transmitting a request to a source MMN that had previously served the wireless device, wherein the source MMN is configured to respond to the request by transmitting a response comprising first RAN congestion status information indicating a first congestion level of a RAN that was servicing the wireless device prior to the target MMN receiving the first message; the target MMN receiving the response comprising the first RAN congestion status information; the target MMN storing the first RAN congestion status information; after storing the first RAN congestion status information, the target MMN receiving a second message comprising second RAN congestion status information indicating a second congestion level of a RAN currently servicing the wireless device, wherein said RAN currently servicing the wireless device is different than said RAN that was servicing the wireless device prior to the target MMN receiving the first message; comparing the second RAN congestion status information with the first RAN congestion status information to determine whether the second congestion level is different than the first congestion level; and in response to determining that the second congestion level is different than the first congestion level, the target MMN forwarding, to a core network node or a RAN Congestion Awareness Function (RCAF), the second RAN congestion status information.