摘要:
A non-real time messaging system (200) for targeting messages to a subscriber unit (222) comprises a synchronized profile of where a subscriber unit should be located (a predetermined base transmission area for transmission of messages to the subscriber unit) maintained between a controller (212) and the subscriber unit. The subscriber unit detects when the subscriber unit is not within the receiving range of a predetermined base transmission area, informs the controller and the controller directs subsequent transmissions to an area identified by the subscriber unit and otherwise transmits subsequent messages to the predetermined base transmission area. The system further includes a plurality of base receivers (217) coupled to the controller for receiving transmissions from the subscriber units and allowing the controller to detect when the subscriber unit is not within the receiving range of a predetermined base transmission area.
摘要:
A first transceiver (122) detects (402) a need for desired information available from a network server (108). In response to detecting the need and before contacting the network server, the first transceiver attempts (412) to obtain the desired information from another transceiver of a plurality of wireless transceivers near the first transceiver, thereby potentially eliminating a necessity for the first transceiver to contact the network server to obtain the desired information.
摘要:
A method and apparatus for mitigating unwanted communication are disclosed. A request to establish communications is received at a first Protection Against Unsolicited Communications in Internet Protocol Multimedia Subsystem (PUC) server. The PUC server determines whether to block the communication. If the communication is blocked, the sender is informed and a record of the blocked communication may be stored. Alternatively, the communication may be delivered to a subsequent PUC server (along with appended information about the sender), the receiver or sent to storage.
摘要:
A MIMO communications system includes a transmitter, and a transmit antenna array connected to the transmitter and having M antenna elements for transmitting M source signals. A receive antenna array is connected to a receiver and has N antenna elements for receiving at least M different summations of the M source signals, with N being less than M. A signal separation processor is connected to the receiver for forming a mixing matrix that includes the at least M different summations of the M source signals so that the mixing matrix has a rank equal to at least M. The signal separation processor separates desired source signals from the mixing matrix.
摘要:
A communications device includes an antenna array for receiving different summations of source signals from a plurality of signal sources, a receiver coupled to the antenna array for receiving the different summations of source signals, and a signal separation processor coupled to the receiver. Processing by the signal separation processor includes creating a matrix based upon the different summations of source signals, with the matrix being defined by linear independent equations with fewer equations than unknowns. The matrix is underdetermined, and parameters associated with the matrix are modified based upon different sets of parameter values, and respective matrix quality factors associated with the different sets of parameter values are determined. The matrix is then biased with a preferred set of parameter values so that the solution space may be narrowed for obtaining a solution.
摘要:
A MIMO communications system includes a transmitter, and a receiver synchronized with the transmitter. The transmitter changes the power levels for each layered space data stream on a time slotted basis. The data streams arrive at the receiver with various power levels, which provides suitable differences in the received signals for population of a mixing matrix for signal separation processing.
摘要:
A communications device for separating source signals provided by M signal sources includes an antenna array comprising N antenna elements for receiving at least N different summations of the M source signals, with N and M being greater than 1. The N antenna elements include at least one antenna element for receiving at least one of the N different summations of the M source signals, and at least two correlated antenna elements for receiving at least two of the N different summations of the M source signals. The at least two correlated antenna elements are uncorrelated with the at least one antenna element. A receiver is connected to the antenna array. A blind signal separation processor is connected to the receiver for forming a mixing matrix comprising the at least N different summations of the M source signals, and for separating desired source signals from the mixing matrix. The mixing matrix has a rank equal up to at least N.
摘要:
A method and apparatus perform remote memory management in an acknowledge-back selective call communication system (100) comprising an infrastructure (102) and a selective call receiver (120). The infrastructure (102) transmits (904) a notification (406) of a pending message for the receiver (120). The receiver (120) reports (906) in response a memory value (414) specifying space available in a memory (322) for storing the pending message. The infrastructure (102) compares (908) the memory value (414) with the length of the pending message to see if sufficient memory space is available to store the pending message in the receiver (120). The infrastructure (102) controls further processing of the pending message based on the result of the comparison.
摘要:
A method and apparatus identifies (810) communication cells (500) in a simulcast radio communication system (100) comprising the cells (500) and a portable communication unit (PCU) (108). Identification bit .patterns (602, 604, 606) are assigned (802) to the cells (500) in a manner such that when transmissions of the identification bit patterns are received simultaneously from cells (500) adjacent to one another, thereby producing a received interference bit pattern (708), identities of the cells (500) received can be resolved to a subset of the cells (500) by analysis of the received interference bit pattern (708), wherein the subset is inclusive of the cells (500) received.
摘要:
A paging system (100) includes a transmitter (104) for transmitting first information including a transmitted page, a receiver (108) for receiving second information, and a diagnostic controller (106) coupled to the transmitter (104) and the receiver (108) for monitoring the first and second information to determine whether the transmitted page was correctly received by the receiver (108).