Method for constructing WVPN (Wireless Virtual Private Network) for CDMA

A method for constructing a WVPN (Wireless Virtual Private Network) for a COMA system which includes a mobile telephone serviced by a private network group, a BTS (Base Transceiver System). a BSC (Base Station Controller), a MSC (Mobile Switching Center) including a MSA (Mobile Signalling Access), a MCC (Mobile Call Control), and a VLR (Visitor Location Register), a HLR (Home Location Register), and a SCP (Service Control Point) comprising the steps of;

• a first step for registering a private network group and extension number to the SCP and judging whether a call by a certain calling subscriber corresponds to an extension number or a MDN (Mobile Directory Number) when a certain calling subscriber calls a certain receiving subscriber of the same group as the calling subscriber;
• and
• a second step for constructing a mobile communication network using the MDN in the case that as a result of the first step the call by the calling subscriber corresponds to the MDN and constructing a WVPN in the case that the call by the calling subscriber corresponds to the extension number, wherein said second step includes:
• a first sub-step for requesting a telephone of the calling subscriber to the HLR, transmitting a telephone number and extension number to the SCP with respect to the calling subscriber, requesting a MDN information of the receiving subscriber, and judging whether there is a group of the telephone number of the calling subscriber;
• a second sub-step for judging whether the extension number transmitted to the SCP exists in the group of the calling subscriber in the case that when there is the group of the telephone number of the calling subscriber as a result of the judgment of the first sub-step;
• a third sub-step for constructing the WVPN by transmitting the MDN corresponding to the receiving extension number to the MCC In the case that the extension number exists in the group of the calling subscriber as a result of the judgment of the second sub-step;
• and
• a fourth sub-step for transmitting a non-available call connection guide message to the calling subscriber in the case that there is not a group of the telephone number of the calling subscriber as a result of the judgement of the first sub-step and in the case that the extension number does not exist in the group of the calling subscriber as a result of the judgement of the second sub-step.

A method for constructing a WVPN (Wireless Virtual Private Network) for a CDMA system which includes a mobile telephone serviced by a private network group, a BTS (Base Transceiver System), a BSC (Base Station Controller), a MSC (Mobile Switching Center) including a MSA (Mobile Signalling Access), a MCC (Mobile Call Control), and a VLR (Visitor Location Register), a HLR (Home Location Register), and a SCP (Service Control Point) comprising the steps of;

• a first step for registering a private network group and extension number to the SCP and judging whether a call by a certain calling subscriber corresponds to an extension number or a MDN (Mobile Directory Number) when a certain calling subscriber calls a certain receiving subscriber of the same group as the calling subscriber;
• and
• a second step for constructing a mobile communication network using the MDN in the case that as a result of the first step the call by the calling subscriber corresponds to the MDN and constructing a WVPN in the case that the call by the calling subscriber corresponds to the extension number, wherein said second step includes:
• a first sub-step for requesting a telephone of the calling subscriber to the HLR, transmitting a telephone number and extension number to the SCP with respect to the calling subscriber, requesting a MDN information of the receiving subscriber, and judging whether there is a group of the telephone number of the calling subscriber;
• a second sub-step for judging whether the extension number transmitted to the SCP exists in the group of the calling subscriber in the case that when there is the group of the telephone number of the calling subscriber as a result of the judgment of the first sub-step;
• a third sub-step for constructing the WVPN by transmitting the MDN corresponding to the receiving extension number to the MCC in the case that the extension number exists in the group of the calling subscriber as a result of the judgment of the second sub-step;
• and
• a fourth sub-step for transmitting a non-available call connection guide message to the calling subscriber in the case that there is not a group of the telephone number of the calling subscriber as a result of the judgement of the first sub-step and in the case that the extension number does not exist in the group of the calling subscriber as a result of the judgement of the second sub-step and in the case that the extension number exists in the group of the calling subscriber as a result of the judgement of the second sub-step.

A method for setting up a call using a wireless network, comprising the steps of:

• determining whether a call to a called subscriber by a calling subscriber uses a first extension number, the first extension number being different from a first mobile directory number of the called subscriber;
• and
• determining whether or not to complete the call using the first extension number, wherein said determining whether or not to complete the call step further comprising,
• determining whether there is a group including a second mobile directory number of the calling subscriber, the group including at least two mobile directory numbers or extension numbers;
• determining whether the first extension number is in the group;
• obtaining the first mobile directory number corresponding to the first extension number when the first extension number is in the group;
• and
• transmitting a non-available call message to the calling subscriber if it is determined that there is no group including the second mobile directory number of the calling subscriber or if it is determined that the first extension number is not in the group including the second mobile directory number of the calling subscriber.