Abstract: A selective call receiver (24) that receives signals transmitted by orbiting satellites (A, B) uses certain information transmitted by the satellites to calculate an estimate of its position. Using that estimate and other information, the selective call receiver (24) is able to save power by disregarding certain information contained in transmitted signals that are not intended for it.

Abstract: A selective call receiver that receives signals transmitted by orbiting satellites uses certain information transmitted by the satellites to calculate an estimate of its position. Using that estimate and other information, the selective call receiver is able to save power by disregarding certain information contained in transmitted signals that are not intended for it.

Abstract: A system controller (102) generates and transmits a radio signal having long messages in data frames (370), and short and long messages in control frames (360). A set of selective call radio addresses is included at the beginning of a control frame (360), each selective call radio address including a subvector which indicates the starting position of a short message or a vector packet within the control frame (360). Vector packets indicate starting positions of long messages within the control frame (360), within other control frames (360), and within data frames (370). A selective call radio (106) receives the radio signal and recovers and processes the short and long messages, using the subvectors and vectors to identify the positions of the short and long messages.

Abstract: A system controller (102) schedules an outbound selective call address (410) and an outbound message (430) at a position within a transmission cycle (330) of a synchronous outbound signaling protocol. The position and the outbound selective call address (410) are stored and linked to each other. The transmission cycle (330) is transmitted. A selective call transceiver (106) receives the transmission cycle (330), recovers the outbound message (430), and generates a response signal which includes an inbound address. The inbound address is determined from the position of the outbound selective call address (410) within the transmission cycle and is included in an inbound message which is transmitted.

Abstract: A system controller (102) generates and transmits a radio signal having long messages in data frames (370), and short and long messages in control frames (360). A set of selective call radio addresses is included at the beginning of a control frame (360), each selective call radio address including a subvector which indicates the starting position of a short message or a vector packet within the control frame (360). Vector packets indicate starting positions of long messages within the control frame (360), within other control frames (360), and within data frames (370). A selective call radio (106) receives the radio signal and recovers and processes the short and long messages, using the subvectors and vectors to identify the positions of the short and long messages.