Abstract:
A system and method for determining timing offset errors in a satellite syst em based upon Doppler and Doppler rate of change is provided. A user terminal (110, 113) determines first and second timing offsets (902, 906) respectivel y associated with first and second satellite beams (1142, 1204) from respectiv e first and second satellites (102, 104). Next, the user terminal (110, 113) determines the Doppler and Doppler rate of change associated with the first and second satellite beams (1100, 1102). A timing offset is estimated from t he measured Doppler and Doppler rate of change and is then compared with the us er terminal's own determined timing offset (906). If the comparison does not produce a value within a predetermined threshold, a beam identification erro r is declared.
Abstract:
seleção de sistema sem fio que decompõe em fator es disponibilidade de recursos rf em telefone de acesso duplo. modalidades de métodos, aparelhos e sistemas permitem o gerenciamento de preempção e serviços de pelo menos uma de uma série de assinaturas que utilizam uma série de cadeias de radiofrequência (rf) em um aparelho de comunicação de vários módulos de identidade de assinante, multi-ativo de maneira que possa acomodar diversos componentes e configurações de hardware rf diferentes. diversas modalidades apresentam métodos implementados por um processador para gerenciar preempção de serviços. em resposta à detecção de que um serviço de uma segunda assinatura iniciado em uma primeira cadeia rf está ou adquirirá por preempção um serviço de uma primeira assinatura que é também servida pela primeira cadeia rf, o processador pode determinar se há um serviço semelhante em uma segunda cadeia rf que possa ser utilizado como substituto para o serviço adquirido por preempção da primeira assinatura e, quando disponível, o processador pode configurar a primeira assinatura para começar a utilizar o serviço substituto até que a primeira cadeia rf esteja disponível.
Abstract:
System for better service reselection when on other than the Most Preferred system. In various aspects, methods and corresponding apparatus are provided for a service reselection system that operates on a device to provide better service reselection during idle mode, origination mode and active traffic mode. A method includes detecting entry into slotted mode operation on a Less Preferred system, waiting for page monitoring to complete at selected slot cycle wakeup times, performing a service reselection scan at the selected slot cycle wakeup times to find More Preferred systems, wherein the service reselection scan is performed after the page monitoring has completed, and limiting a time duration of the service reselection scan so as to avoid interference with the page monitoring to be performed at slot cycle wakeup times that follow the selected slot cycle wakeup times.
Abstract:
The various embodiments include a dual-SIM-dual-active (DSDA) device and methods for implementing robust receive (Rx) processing to resolve radio frequency coexistence interference between two subscriptions operating on the DSDA device. The DSDA device may detect when a subscription (the "aggressor") de-senses the other subscription (the "victim") as a result of the aggressor's transmissions, and in response, implement robust Rx processing to mitigate the effects of de-sense on the victim while causing minimal impact to the aggressor.
Abstract:
Techniques for operating two receivers to receive data and paging from two systems are described. A primary receiver is associated with better performance than a secondary receiver under poor RF conditions. The two receivers may be operated in either a hybrid mode in which the primary receiver is used to receive paging or a simultaneous mode in which the second receiver is used to receive paging. One of the modes may be selected for use based on RF conditions, received power, demodulation metrics, and/or other criteria. In one design, a mode is selected based on the received power and one or more thresholds. In another design, the hybrid mode is selected for poor RF conditions and, for good RF conditions, the hybrid or simultaneous mode is selected based on received power.