Abstract: A method and system of generating neighbor cell lists in a cellular environment having a first cell and a plurality of neighbor cells. The first cell and the neighbor cells each include a plurality of designated active controllers associated therewith. In one embodiment, the method includes the steps of designating one of the controllers in the first cell as the active controller for the first cell, generating a first neighbor list of the active controllers for the neighbor cells, and generating a second neighbor list of the active controllers for the neighbor cells upon the change in active status of any of the neighboring active controllers. The lists are generated in accordance with a database of controllers linkable with the designated active controller.

Abstract: A wireless communication system, including a first fixed communication unit and a second fixed communication unit, a mobile communication unit responsive to the first fixed communication unit and the second fixed communication unit, a method for transferring a communication signal associated with the mobile communication unit from the first fixed communication unit to the second fixed communication unit, the method comprising the steps of establishing the communication signal between the first fixed communication unit and the mobile communication unit; and sending a list to the mobile communication unit, the list comprising a reserved traffic channel associated with the second fixed communication unit, the mobile communication unit establishing communication with the second fixed communication unit over the reserved traffic channel when the communication signal is interrupted.

Abstract: A wireless communication system (200, 300, 400, 500) mitigates the effects of excess timing delay caused by varying lengths of communication paths. In one general implementation, a transition communication path (206, 323, 329) is used to transfer a time-advanced version of a timing reference signal so that the cumulative time delay at a transition cell (209, 325, 331) is reduced. In another general implementation, the timing reference signal is time-advanced in all communication paths (403-411), and selected communication paths (403-407) include a time delay means (423-427, 503-507) such that the cumulative time delay at an area (421) near a target coverage area (130) is reduced. By reducing the cumulative time delay at the area (421) near the target coverage area (130), a handoff of a communication of a mobile station (128) into the target coverage area (130) can be performed.

Abstract: A radio frequency backbone communication system is offered for exchanging, a plurality of communicated signals between a central site (205) and a plurality of communication units (16-18) through a plurality of remote base sites (60-66). The system includes at least one mobile function transceiver (201-204) located at the central site (205), transceiving a communicated signal of the plurality of communicated signals on a shared communication resource of a base site of the plurality of base sites (60-66) and, means for synchronizing a transceiver at the base site to the communicated signal of the at least one mobile function transceiver (201-204).

Abstract: A communication system employs a method for exchanging communicated signals between a remote base site (e.g., 63) and a central site (205) on a communication resource (e.g., 77) assigned to the remote base site (63). The central site (205) or the remote base site (63) determines that a signal must be exchanged between the remote base site (63) and the central site (205). The remote base site (63) then allocates the communication resource (77) for exchanging the signal from those communication resources (e.g., 76 and 77) assigned to the remote base site (63) for exchanging signals with communication units (e.g., 18) in the service coverage area (53) of the remote base site (63).

Abstract: A method and apparatus is provided for locally routing calls in a communication system. The method and apparatus provide PSTN interconnects (N, P, Q,) at each of the base station controllers (11, 14) and at the mobile switching center (12). A control intercept (13) intercepts PSTN command information being communicated between the mobile switching center (12) and the base station controllers (11, 14), and routes the PSTN command information to a PSTN interconnect (N, P) at a base station controller (11, 14) when local call service is required.

Abstract: A base-site (304) combines baseband frequency hopping and fast-synthesizer hopping to produce an economical frequency hopping communication system (300). The base-site (304) combines the fast-synthesizer frequency hopping capability of transmitters (307-309) with baseband frequency hopping to produce a frequency hopping communication system (300) which serves the same number of subscribers served by transmitters (208-213) in a purely baseband hopping communication system (200), but with fewer transmitters (307-309). The implementation of frequency-selective cavities (312-317) having very low loss eliminates the need for wideband hybrid combiners (112-114), which in turn eliminates transmitted-signal power loss experienced in a purely fast-synthesizer frequency hopping communication system (100).

Abstract: In a TDMA cellular network, there is provided a mechanism for shared-carrier frequency-hopping. It comprises: allocating on a frame basis within a reuse diameter to one coverage area during certain timeslot(s) at least one from a pool of TDM-frame-hopped carriers and allocating on a frame basis within that carrier reuse diameter to another coverage area during certain other, substantially non-overlapping timeslot(s) that frame-hopped carrier, all in substantially non-interfering time-synchronism with any proximal reuse of that carrier, whereby the advantages of frequency hopping are obtained. Stated differently, it comprises: at one instant in time, allocating within a reuse diameter to one coverage area at least one of a plurality of hopped carriers and at that same instant in time, allocating within that carrier reuse diameter to another coverage area another of that plurality of hopped carriers, all in time-synchronism with any proximal reuse of that carrier.

Abstract: A base-site (304) combines baseband frequency hopping and fast-synthesizer hopping to produce an economical frequency hopping communication system (300). The base-site (304) combines the fast-synthesizer frequency hopping capability of transmitters (307-309) with baseband frequency hopping to produce a frequency hopping communication system (300) which serves the same number of subscribers served by transmitters (208-213) in a purely baseband hopping communication system (200), but with fewer transmitters (307-309). The implementation of frequency-selective cavities (312-317) having very low loss eliminates the need for wideband hybrid combiners (112-114), which in turn eliminates transmitted-signal power loss experienced in a purely fast-synthesizer frequency hopping communication system (100).

Abstract: In a TDMA cellular system, there is provided a mechanism for splitting the allocation of time slots within a TDM frame between adjacent coverage areas. There is provided a method of and apparatus for time-allocation of TDMA channels. It comprises: periodically allocating some portion of a carrier of radio traffic to one coverage area during one time interval and periodially allocating some other portion of that same carrier to another coverage area during a substantially non-overlapping time interval, all in time synchronism with any proximal reuse of that carrier. The distribution of channels in adjacent coverage areas thereby approaches parity and the minimum channel capacity per coverage area is enchanced.

Abstract: Method and apparatus for facilitating communication of information in a system without the use of a baseband hopping unit, by sharing a common TDM bus between a plurality of radio communication units, processing units, and information links, where the processing units extract traffic channel information, packetize and/or unpacketize the information, and return same back to the common bus for retrieval by the information links or radio communication units.

Abstract: The public switched telephone network (PSTN) (120) is coupled to both the central switch (MSC) (102) and the base station controller (BSC) (101, 110). A call placed to the BSC (101) can be routed to a base station (103-105) by the BSC (101) or to the MSC (102) for routing to the PSTN (120) or another BSC (110). The MSC (102) processes the signalling information routed from the BSC (101). If a call is placed to the MSC (102), the MSC (102) routes the call to the appropriate BSC (101, 110) while also processing the signalling information.

Abstract: An improved cellular telephone communication system is described having operational steps which prevent a call from being dropped due to a radiotelephone not receiving a handoff instruction from its host base site. The system includes a switch controller for determining that the radiotelephone requires a handoff from a first base site coverage area to a second base site coverage area and for communicating a handoff message to the associated first and second base site equipment. The first base site equipment then transmits the handoff message to the radiotelephone. If the radiotelephone does not receive the message, it determines that the call has been lost, siezes a signalling channel from the second base site, and requests, via the second base site a call reconnection by transmitting a special message. The second base site then informs the radiotelephone of the handoff instruction and the handoff is completed with a successful reconnection of the call.

Abstract: A telephone system for providing communications between mobile radiotelephones, portable radiotelephones and landline telephones includes a land-line telephone system including a land-line switching network for providing communication paths for land-line telephones and a mobile radiotelephone system for providing communications paths for mobile and portable radiotelephones. The mobile radiotelephone system includes a digital switching network, base stations, and PCM analog-to-digital (A/D) and digital-to-analog (D/A) converters interposed between the base stations and the digital switching network and between the land-line switching network and the digital switching network. Analog ports are interfaced by the PCM A/D and D/A converters to incoming and outgoing serial bit streams coded according to pulse-code-modulation (PCM) techniques standardized for telecommunications systems by the International Telegraph and Telephone Consultative Committee (CCITT).