Access control method, system and network element

Abstract

The invention relates to the technical field of communication, in particular to an access control method, an access control system and an access control network element. The invention aims to solve the problem that part of emergency service demands cannot be satisfied due to the deletion of other non-emergency service bearers when User Equipment (UE) moves from a normal region to a forbidden region and does not have a signaling bearer. The access control method provided by the invention comprises the following steps of: receiving an access request from the UE; determining that the current access region of the UE is the forbidden region and a user needs an emergency service; and initiating a signaling bearer establishing process to establish the signaling bearer when the UE does not has the signaling bearer. The invention also provides an access control system and an access control network element. The access control method provided by the invention ensures the satisfaction of a user emergency calling service demand when the UE moves from the normal region to the forbidden region.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an access control method, system and access control network element. Background technique [0002] Currently, the 3GPP organization is studying the Emergency Call (EMC) service of the IP Multimedia Subsystem (IMS). The so-called emergency call service is beneficial to the IP-Connectivity Access Network (IP-CAN, Networks such as GPRS / UMTS / E-UTRAN / WLAN / Wimax) and IMS systems provide users with emergency call services (such as alarm services and fire alarm services, etc.). [0003] For the emergency call service, even if the user is in a forbidden area (such as a roaming forbidden area (forbidden location areas for roaming) or a service forbidden area (forbidden location areas for regional provision of service) or a CSG (closed subscriber group, Closed Subscriber Group) restricted area, etc., That is, users need to be allowed to use normal services in these areas (al...

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Problems solved by technology

[0004] When the UE moves from a normal area to a prohibited area, the network will delete other non-emergency service bearers of the UE. If the UE does not have a signaling bearer (in the prior art, the signaling can be transmitted through a default bearer, etc.), due to The UE's non-emergency service bearers are all deleted, which will cause the UE's emergency service to be terminated through signaling control. In addition, when the emergency service ends, the UE will not be able to use the network side due to the deletion of the bearers between the UE and the network side. It is forbidden to initiate emergency business again in the area, nor can it receive the call back from the emergency center, which does not meet the requirements of emergency business

[0005] In addition, when the UE makes an emergency call in a prohibited area, how to restrict the UE from receiving other service establishment requests, or when the user ends the emergency call, the user will continue to It is also possible to make another emergency call, or receive a call back from the emergency call center. How to ensure that the UE can accept the service establishment request and only accept the service establishment request of the emergency service, and reject the establishment request of other services. At present, there is no mechanism to solve this problem

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