Method and device for access control

Abstract

The invention discloses a method for access control for realizing excellent access control. The method comprises the following steps: a core network control node receives session management request messages sent by a terminal; and the core network control node sends session management back-off timer messages to the terminal when the core network control node determines that the node is in an overload state. The invention further discloses a device for realizing the method.

Description

Method and device for access control technical field The present invention relates to the communication field, in particular to a method and device for access control. Background technique The existing 3GPP (Third Generation Mobile Communications) protocol proposes that when the core network control entity SGSN (Serving GPRS (General Packet Radio Service) Support Node) or MME (Mobility Management Entity) is overloaded, it can preferentially refuse to carry low-priority The NAS (Non-Access Stratum) request message indicated by NAS-level access, and at the same time, the reject message may optionally carry a backoff time, so that the terminal cannot initiate any request before the backoff timer expires. However, due to the layered design of the NAS protocol, the MMlayer (mobile management layer) and SMlayer (session management layer) are maintained independently. For MMlayer, the network performs APNbasedmobilitymanagementcongestion (APN-based mobility management congestion...

AI Technical Summary

Problems solved by technology

Therefore, under SGSN or MME overload conditions, the SessionManagementCongestionControl (Session Management Congestion Control) mechanism cannot work effectively

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