摘要:
Apparatus, methods, and computer-readable media for facilitating interruption handling in satellite-based communications are disclosed herein. An example method for wireless communication at a UE includes determining an interruption for a satellite-based communication link based in part on UE location information and blockage information of an obstruction that blocks LOS propagation for the satellite-based communication link. The example method also includes refraining performance of one or more communication link correction procedures for a time period associated with the interruption.
摘要:
A method of periodically attempting to access the HPLMN or an EHPLMN with higher priority in NTN systems with discontinuous coverage is proposed. A UE registered in VPLMN starts a timer T to periodically attempt to obtain service on its HPLMN or EHPLMN. When access stratum is deactivated due to discontinuous coverage in NTN, the UE does not stop the timer T, and postpone the periodic attempts to a later time, e.g., upon or after the UE activates the access stratum.
摘要:
In one implementation, information indicating that a communication device is requesting to enter a dedicated transmission mode in a talkgroup may be received. In addition, information indicating a first position of the communication device may be received. A satellite constellation may be controlled to establish a first channel for communications for the talkgroup within a first beam that has a coverage area including the first position of the communication device. Further, a potential second position of the communication device may be determined. The satellite constellation may be controlled to establish a second channel for communications for the talkgroup within a second beam that has a coverage area including the potential second position of the communication device.
摘要:
A system and method for improving efficiency of satellite communications is described. In one embodiment, multiple return links are associated with a single forward link to reduce communications costs.
摘要:
Communications of a mobile station with a satellite mobile communications system and a terrestrial mobile communications system are coordinated. The mobile station is registered with the terrestrial mobile communications system and, responsive to the registration of the mobile station with the terrestrial mobile communications system, the mobile station is concurrently registered with the satellite mobile communications system. The concurrent registration may include implicitly registering the mobile station with the satellite mobile communications system, e.g., by storing information identifying the mobile station may be stored in a location register of the satellite mobile communications system responsive to the registration of the mobile station with the terrestrial mobile communications system, and maintaining synchronization between the two registrations. Authentication tokens may be pre-generated for quick re-registration with a satellite mobile communications system.
摘要:
A system and method for improving efficiency of satellite communications is described. In one embodiment, multiple return links are associated with a single forward link to reduce communications costs.
摘要:
A satellite communications system provides a communications service to a mobile terminal on which different communications applications may be run. Calls are set up between any of the applications via a satellite to a network management center which provides different service adaptors which adapt the calls to different types of service provided over terrestrial networks such as telephony, facsimile, internet or ATM services. The bandwidth allocated to each call over the satellite link may be varied during the call according to demand either from the relevant application or from the network management center. Multiple calls may be connected concurrently to or from different applications running on the mobile terminal. A maximum bandwidth is allocated to each call. Efficient use is thereby made of the limited bandwidth available over the satellite, according to the instantaneous bandwidth requirements of different applications. For real-time calls requiring multiple slots per frame in a TDMA channel, the slots are mutually spaced apart to reduce delay.
摘要:
A method of operating a mobile terminal providing wireless communications can include receiving communications service from a first communications network providing service over a first coverage area. While receiving communications service from the first communications network, a first identity code can be received from a second communications network providing service over a plurality of second coverage areas wherein a first one of the second coverage areas includes the first coverage area and wherein the first identity code from the second communications network identifies availability of service with the second communications network in the first one of the second coverage areas. After loss of communications with the first communications network, a second identity code can be received from the second communications network. When the second identity code from the second communications network is different than the first identity code from the second communications network, a registration can be performed with the second communications network so that communications service can be received by the mobile terminal from the second communications network in a second one of the second coverage areas corresponding to the second identity code from the second communications network.
摘要:
Disclosed is a method for applying different charge rates and indicating the location of a mobile station in a cellular mobile telecommunication system. Location information for the major service zone of the mobile station is monitored in the home-zone list to apply different charge rate to the mobile station in the home zone and the non-home zone. By applying the different charge rates according to the location of the mobile station, it is possible to provide a low-priced charge system in which the charge rate is lower than that of the mobile telecommunication network or equal to or slightly higher than that of the PSTN. Moreover, the mobile station indicates its present location by a specific message or a specific tone, so that the subscriber knows both the present location and the type of the charge rate that is currently applied.
摘要:
A method and an apparatus for updating the location of a plurality of mobile stations (107) in a moving craft or vehicle (105). Each time a new mobile station (107) is attached to a common terminal (103) located in the moving craft or vehicle, an initial location updating message is transmitted to a satellite system (101). Information based on the initial location updating message is then stored in the satellite system (101). When the common terminal (103) enters a new location area, a location updating message is transmitted including an identity of the common terminal (103). The satellite system (101) can then derive the new location for each of the attached mobile stations (107) based on the transmitted location updating message and the stored information on the mobile stations (107) currently being attached to the common terminal (103). In this way, the traffic load for location updating is significantly reduced, also providing communication access for a plurality of mobile stations in a moving craft or vehicle.