Abstract:
A telepoint communications system (200) employs a method (621-633) of selectively changing the service state of a communication path. The telepoint system (200) includes a base unit (201) and at least one handset (210). The base unit (201) is coupled to a public switched telephone network (PSTN, 206) via at least one wireline (202), and is able to communicate with the handsets (210-220) via at least one radio frequency (RF) channel. The method includes the step of, at the handset (210), receiving (605) a PSTN access number from the base unit (201). The handset (210) might then signal (617), to the base unit (201), a service request (416) to change the service state for the PSTN wireline associated with the PSTN access number. The base unit (201) might, after receiving the request signal, alter the service state (508) of the PSTN wireline.
Abstract:
In a wireless code-division multiple access (CDMA) system (100), a talkgroup (101) of subscriber units is provided. A sub-group (102) of subscriber units, forming a part of the talkgroup is assigned at least one inbound code (416-417). The entire talkgroup is assigned an outbound code (415). Members of the sub-group may simultaneously transmit voice information (410-411) using the at least one inbound code, which voice information is summed (412) and retransmitted to the talkgroup using the outbound code. Subscriber units in the talkgroup, but not included in the sub-group, are allowed to transmit voice information only after requesting, and receiving, an additional inbound code.
Abstract:
A method and apparatus for facilitating handoff from a network access point (NAP) that is arranged and constructed to provide service to a communications unit (CU) in a frequency hopped communications system. The operations that are performed are providing service between the CU and the NAP on a connection using a first frequency hopping pattern (FHP); determining that the connection is suitable for discontinuation based on RSSI or load; sending a first message including an ID for the NAP and schedule for the CU to neighboring NAPS, the message requesting assistance with the service on tho first FHP; and receiving a second message from a neighboring NAP, arranged and constructed to provide connections to CUs using a second FHP, the second message indicating that assistance can be provided by the neighboring NAP.
Abstract:
In a wireless code-division multiple access (CDMA) system (100), a talkgroup (101) of subscriber units is provided. A sub-group (102) of subscriber units, forming a part of the talkgroup is assigned at least one inbound code (416-417). The entire talkgroup is assigned an outbound code (415). Members of the sub-group may simultaneously transmit voice information (410-411) using the at least one inbound code, which voice information is summed (412) and retransmitted to the talkgroup using the outbound code. Subscriber units in the talkgroup, but not included in the sub-group, are allowed to transmit voice information only after requesting, and receiving, an additional inbound code.
Abstract:
A method and apparatus for facilitating handoff from a network access point (NAP) (103, 105, 107) that is arranged and constructed to provide service to a communications unit (CU) (111) in a frequency hopped communications system is disclosed. The operations that are performed are providing service between the CU (111) and the NAP (103, 105, 107) on a connection using a first frequency hopping pattern (FHP); determining that the connection is suitable for discontinuation based on RSSI or load; sending a first message including an ID for the NAP and schedule for the CU to neighboring NAPS (103, 105, 107), the message requesting assistance with the service on the first FHP; and receiving a second message from a neighboring NAP (103, 105, 107), arranged and constructed to provide connections to CUs (111) using a second FHP, the second message indicating that assistance can be provided by the neighboring NAP.
Abstract:
In a geographic region that contains a trunking communication system (101) and a cellular communication system (100) where the coverage area of each system substantially overlaps, a method that enables a communication unit (104) to operate in either system is disclosed. Normally in accordance with the present invention, a communication unit will monitor a control channel of the cellular communication system (100). When the communication unit is needed within the trunking communication system (101), a communication channel controller of the trunking communication system (101) will place a telephone call to the communication unit via the cellular communication system (100). The telephone call indicates to the communication unit that it should transfer its affiliation from the cellular communication system (100) to the trunking communication system (101). Once the communication unit has transferred its affiliation to the trunking communication system (101), it operates as a trunking communication unit.