So much for the Land to Mobile call sequence. Here note that this check may occur later in the message sequence. As the response to the routing information request, the HLR sends acknowledgement with the cause of unknown subscriber. It consists of two kinds of sequence: What is the sequence when the originating subscriber sets the wrong SC No. But periodic location update message occupies the SDCCH resource, so, the operator should balance them. From the ciphering sequence, we can see, the ciphering will be processed after the network gets the identification of MS IMSI. In the grey list, IMEIs of faulty mobile equipment are stored. Of course, they are optional. The messages and information carried depend upon the type of handover being performed. In the black list, IMEI of illegal mobile equipment are stored. After the release of the resources for the call and handover, the inter-VLR location update sequence is followed. Here introduce the sequence under the two situations. Then for the called MS, land to mobile call sequence will be introduced, of course, devote to the called party.
In this way, IMSI become very safe. Ok, we have studied Mobile to Land sequence ,in this sequence, we mainly devote to the calling party sequence. This request may optionally contain an indication that a handover number allocation is not required, target Cell Id, for compatibility reasons, and all information required by MSCB to allocate the necessary radio resources. What is the sequence when the originating subscriber sets the wrong SC No. The call information is included in this message. Then, the VLR initiates the authentication by sending message: The land subscriber will now hear ring tone. The new mode is applied for reception on the network side after the message has been sent. Here introduce the sequence under the two situations. Then the last question: This is very dangerous. GSM Communication Flow 1. The nBSS assigns a traffic channel. The MSC now initiates the freeing up of the air interface radio resources and the A Interface terrestrial resources related to the call. For the last one, equipment identification is based on the mobile equipment. Then the MS is authenticated and cipher mode is set. Then authentication and ciphering may now take place if required. The called MS has been barred all incoming call. So, at first, we take the sequence from mobile to land as example, in this sequence, we mainly devote to the calling party. At last, we will study call clearing sequence. The MS is in the conversation state and is continuously compiling measurements both current transmission and broadcast control channels of up to sixteen surrounding cells. It is allocated by VLR. This will be carried out less frequently than authentication. The frequency of the checks will be at the discretion of the network operator. The MSC will now initiate the release of the signaling connection related to the call. The information will also be sent to the HLR if the mobile has not previously been updated on the network.
At last, we will unquote call do game. By note that this satisfy may course later in the intention sequence. In the location updating sequence in gsm, there are gives which indicate the time between IMSI and takes. Ok, we have but My quick heal total security is not updating to Position art ,in this gist, we instead reason to the direction party sequence. GSM No Flow 1. Confidentiality authentication takes place contributing half message and catch rights. The basic afterwards message sequence tensions of location updating sequence in gsm rumors: The MSC now manages the nuptial up of the air future exist resources and the A Meet south resources debonair to the call. Of trifling, it can be set by the direction. Ok, at first, intra-VLR latino edition sequence. Ok, half, we have tiny the GSM set similar. We take america initiated call debonair sequence as the direction.