Mobility management-radio resource layer interface system and method for handling dark beam scenarios
View Patent ↗A method is presented describing how information and data is exchanged between a user's access terminal's mobility management and radio resource software layer in a satellite based telecommunications system, wherein the telecommunication system comprises one or more satellites, new and existing gateways, and a user's access terminal, which comprises a mobility management and radio resource software layer, the method pertaining to data and information flow between them, in response to various stimuli and conditions as the user enters into and out of various modes of operations, including deactivation, activation and illumination of a dark beam of a spot beam that is a shared resource.
1. A method for establishing communications between an access terminal and a new service provider, through the distribution of information and data between a radio resource layer and a mobility management layer of the access terminal, in a satellite communications system, comprising the steps of:
camping on a broadcast channel from an existing service provider;
transmitting an attach request from the mobility management layer to the radio resource layer;
performing a dark beam activation procedure by the radio resource layer;
providing system information about a temporary broadcast channel from a new service provider from the radio resource layer to the mobility management layer;
performing an attach procedure to the new service provider by the mobility management layer; and
entering into a normal service state by the mobility management layer.
2. The method according to claim 1 , wherein the step of camping on a broadcast channel comprises:
entering a GMM-DEREG PLMN Search state by the mobility management layer;
receiving one or more broadcast channel transmissions containing system information from the existing service provider, each broadcast channel corresponding to a different spot beam;
measuring parameters for each of the one or more broadcast channels by the radio resource layer;
passing system information contained in the one or more broadcast channels that exceeds threshold parameters for adequate reception from the radio resource layer to the mobility management layer;
receiving instructions to camp on a specific spot beam from the mobility management layer; and
camping on the specific spot beam by the radio resource layer.
3. The method according to claim 2 , wherein the step of camping on a broadcast channel further comprises:
sending a confirmation to the mobility management layer.
4. The method according to claim 3 , wherein the step of sending a confirmation comprises:
sending a GMMRR_CAMP_CNF message to the mobility management layer from the radio resource layer.
5. The method according to claim 1 , wherein the step of transmitting an attach request comprises:
entering into a GMM-DEREG Normal Service state by the mobility management layer;
entering into a GMM-DEREG Attach Needed state by the mobility management layer; and
passing an attach procedure request message from the mobility management layer to the radio resource layer.
6. The method according to claim 1 wherein the step of providing system information comprises:
verifying that a temporary broadcast channel is transmitting;
obtaining system information from the temporary broadcast channel;
passing a message to the mobility management layer from the radio resource layer that contains the system information about the temporary broadcast channel;
passing a message from the mobility management layer to the radio resource layer that contains a request of the radio resource layer to camp-on a temporary broadcast channel;
entering into a GMM-DEREG PLMN Search state by the mobility management layer;
passing a message from the radio resource layer to the mobility management layer indicating that camp-on of the temporary broadcast channel has occurred; and
entering into a GMM-DEREG Normal Service state by the mobility management layer.
7. The method according to claim 6 , wherein the step of passing a message comprises:
the message passed from the radio resource layer to the mobility management layer is a GMMRR_CAMP_IND message.
8. The method according to claim 6 , wherein the step of passing a message comprises:
the message passed from the mobility management layer to the radio resource layer is a GMMRR_CAMP_REQ message.
9. The method according to claim 6 , wherein the step of passing a message comprises:
the message passed from the radio resource layer to the mobility management layer is a GMMRR_CAMP_CFM message.
10. The method according to claim 1 , wherein the step of entering into a normal service state comprises:
entering into a GMM-REG Normal Service state by the mobility management layer.