摘要:
Apparatuses and methods related to tracking locations of multicast group members within a wireless communication system are disclosed. An access terminal sends a group member report to an access network, the group member report indicating a location of the access terminal and at least one multicast group, the group member report being sent before a multicast session associated with the multicast group is initiated, determines a location update rule, the location update rule being a manner in which to report location updates of the access terminal to the access network and reports location updates of the access terminal to the access network based on the determined location update rule.
摘要:
Methods and systems for sending multicast messages are disclosed. A multicast message is received to be transmitted to a plurality of access terminals at a radio access network (RAN), the received multicast message having a first format. The first format may correspond to a conventional multicast message format. The RAN determines whether the received multicast message requires special handling. If the RAN determines the received multicast message requires special handling, the radio access network converts the received multicast message from the first format into a second format. The RAN transmits the converted multicast message with the second format (e.g., a data over signaling (DOS) message) on a control channel to at least one of the plurality of access terminals. The access terminals receiving the converted multicast message interpret the message as a multicast message.
摘要:
A system, method, and computer device that selectively maintain an open broadcast interface to a communication control device that is controlling wireless communication to at least one wireless communication device that is configured to receive group-directed communications for a communication group, such as a push-to-talk (PTT) group. In one embodiment, the wireless communication device registers at the communication control device, such as a base station controller, and at least one broadcast interface is established between the communication control device and another computer device, such as a broadcast A10 interface with a broadcast serving node (BSN). The communication control device maintains the broadcast interface while the wireless communication device configured to receive group-directed communications is registered such that group-directed broadcast communications can more rapidly be delivered to the wireless communication device. When the communication control device determines that the group communication has ended, it releases the broadcast interface.
摘要:
An access network determines to transmit multicast messages on a downlink shared channel. The access network receives a multicast registration message and a traffic channel request from at least one access terminal. The access network assigns a traffic channel to the at least one access terminal, and transmits the multicast messages on the downlink shared channel. In another example, the access network can determine a channel type upon which the support a multicast session, can indicate the channel type selection to the at least one access terminal in an announce message and can then transmit the multicast messages for the multicast session on the selected channel type. The at least one access terminal receives the announce message, requests a traffic channel and receives a traffic channel assignment, registers to the multicast session and monitors the downlink shared channel for multicast messages.
摘要:
A system, method, and computer device that selectively maintain an open interface to a communication control device that is controlling wireless communication to at least one of a plurality of wireless communication devices that are in a communication group, such as a push-to-talk (PTT) group. In one embodiment, the wireless communication device registers at the communication control device, such as a base station controller, and at least one interface is established between the communication control device and another computer device on the wireless communication network, such as a broadcast A10 interface with a broadcast serving node (BSN). The communication control device will then maintain the interface while the at least one wireless communication device, or at least one member device of the communication group, is registered such that group communications can more rapidly be delivered to the wireless communication device.
摘要:
Aspects of reducing an occurrence of false grants for a multicast session within a wireless communications network are disclosed. For example, an access network receives an announce message to be transmitted to a plurality of access terminals, the received announce message configured to announce a given multicast session. The access network determines whether sufficient resources are available to support the given multicast session, The access network configures the received announce message to convey whether sufficient resources are available to support the given multicast session based on the determining step, and transmits the configured announce message to the plurality of access terminals. A given access terminal receives the announce message, and determines whether the received announce message indicates whether sufficient resources are available to support the given multicast session. The given access terminal sends an announce acknowledgment (ACK) message that indicates an acceptance or rejection of the given multicast session.
摘要:
An access network determines to transmit multicast messages on a downlink shared channel. The access network receives a multicast registration message and a traffic channel request from at least one access terminal. The access network assigns a traffic channel to the at least one access terminal, and transmits the multicast messages on the downlink shared channel. In another example, the access network can determine a channel type upon which the support a multicast session, can indicate the channel type selection to the at least one access terminal in an announce message and can then transmit the multicast messages for the multicast session on the selected channel type. The at least one access terminal receives the announce message, requests a traffic channel and receives a traffic channel assignment, registers to the multicast session and monitors the downlink shared channel for multicast messages.
摘要:
Aspects of de-registering a multicast group member from a multicast group within a wireless communications network are disclosed. An access terminal sends a first multicast registration message to an access network, with the first multicast registration message identifying a first set of multicast groups. The access network receives the first multicast registration message and registers the access terminal for each of the first set of multicast groups. The access terminal sends a second multicast registration message, the second multicast registration message omitting at least one multicast group from among the first set of multicast groups, the second multicast registration message being sent to request de-registration, for the access terminal, from at least one multicast group. The access network receives the second multicast registration message and interprets the second multicast registration message as a request to de-register the access terminal from the omitted at least one multicast group.
摘要:
In an embodiment, an application server determines a priority associated with a given multicast message for transmission to at least one access terminal, configures the given multicast message to indicate the priority of the given multicast message and forwards the configured multicast message to an access network for transmission to the at least one access terminal a number of times based at least in part on the indicated priority. Alternatively, the application server can indicate, in the configured multicast message, the number of times to transmit the given multicast message. The priority, or number of times to transmit the given multicast message, can be conveyed to the access network by a flag inserted into the configured multicast message by the application server. The access network determines the number of times to transmit the given multicast message to the at least one access terminal based on the flag.
摘要:
Techniques and systems are disclosed for estimating an unknown image from a plurality of cone-beam computed tomography (CBCT) image projections. The unknown image is estimated by solving for minima of an expression comprising a fidelity term that is a function of the plurality of image projections and a regularization term that is responsive to a sparsity of the CBCT image projections. The minima of the expression is iteratively estimated by calculating an image gradient of the function, determining a step size based on a based on a Barzilai-Borwein (BB) formulation and adjusting the minima estimate using the projected image gradient and a step size.