Abstract:
A communication system (200) comprising a mobile station (202) and a network (252) implements a persistent packet data control channel (302) that provides for a continuous exchange of control information, such as system information (SI) messages and handoff-related information. The mobile station implements the persistent packet data control channel by mapping the persistent packet data control channel to a packet associated control channel (308) when a packet associated control channel is available and to a virtual associated control channel (310) when a packet associated control channel is not available. The virtual associated control channel allows the mobile station to pass control information to network in the absence of an uplink Temporary Block Flow (TBF).
Abstract:
A wireless communication device (102) includes a multi-mode transceiver (204) that is operable to communicate with a plurality of communication networks. The device (102) also includes a memory (216) for storing: an electronic address book (226) that includes a plurality of identifiers (302), each identifier (302) identifying a call destination device; a plurality of access network choices (304) for at least one of the identifiers (302); and a plurality of service choices (308) for at least one of the identifiers. The device (102) further includes a controller (210) having access to the memory (216) for determining a preferred call model and selecting one of the plurality of access network choices and one of the plurality of service choices as a preferred call model for at least one of the identifiers.
Abstract:
Communications are established between an originating mobile station (104) and a target mobile station (120) in an expedited manner. An initial short packet is transmitted from an originating mobile station (104) and the initial short packet is translated into an Internet Protocol (IP) packet. The IP packet is transmitted to a target Packet Control Unit (PCU) (116). An acknowledgment IP packet is responsively received from the target mobile station (120) via the target PCU (116) and a communication link is established between the originating mobile station (104) and the target mobile station (120).
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 (A-I) 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 (A-I) 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 (A-I) 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 (A-I) another of that plurality of hopped carriers, all in time-synchronism with any proximal reuse of that carrier. The control and access carriers may also be included in the hopping pool, causing certain timeslots to be hopped on a sequence different from the others. The pool of hopped carriers is further apportioned among co-located sites into hopping groups, thereby reducing intra-system synchronization requirements. To solve the near/far problem, TDM timeslots bordering hopping boundaries are preferentially allocated to less distant mobile users.
Abstract:
A handover request (408) is received. The handover request (408) is for a mobile station to move between a packet-based network (112) and a circuit-voice with packet data based network (102). The handover request (408) is processed at a network element (108) to appear as a packet handover to the packet based network (112). The network element (108) provides packet circuit inter-working in order to facilitate a handover of an on-going voice session at the mobile station (110) such that the handover appears to be a voice handover to the circuit-voice with packet data based network (102).
Abstract:
A communication system (200) provides for a mobile station (MS) (202) to pre-register with a Serving GPRS Support Node (SGSN) (250) servicing a neighboring Routing Area (RA) (208) that is a handoff candidate. In pre-registering with the neighboring RA and SGSN, the MS at least partially registers with the RA and SGSN, that is, at least a portion of the MS's registration information is conveyed to the neighboring SGSN serving the neighboring RA, prior to the MS being served by an associated neighboring BSS (230), for example, prior to an initiation of a handoff of the MS to the neighboring BSS. By pre-registering with the candidate SGSN, a duration of a registration process and the corresponding service disruptions when the MS is handed off to such an SGSN are reduced.
Abstract:
A method (400) and a communication network (110) for operating a cross coding element are described herein. The communication network (110) may detect a condition suggesting a change in encoded protocols between a first endpoint (240) and a second endpoint (250) such as, but not limited to, a call setup, an application requirement, and a handover associated with the first endpoint (240). The first endpoint (240) may operate in accordance with a first encoded protocol whereas the second endpoint (250) may operate in accordance with a second encoded protocol. The communication network (110) may communicate with a cross coding element (230) configured to convert a first encoded protocol signal from the first endpoint (240) to a second encoded signal. The first encoded signal may be encoded by the first encoded protocol, and the second encoded signal may be encoded by the second encoded protocol.
Abstract:
A method and system of generating neighbor cell lists in a cellular environment having a first cell (cell D) (116) and a plurality of neighbor cells (cells C, E, F, and G). The first cell and the neighbor cells each include a plurality of designated active controllers associated therewith. In one embodiment, one of the controllers (RNC3) (118) in the first cell is designated as the active controller for the first cell, a first neighbor list of the active controllers (RNC1, RNC3, RNC4, and RNC4, respectively) for the neighbor cells is generated, and, upon a change in active status of any of the neighboring active controllers, a second neighbor list of the active controllers (RNC2, RNC4, RNC4, and RNC4, respectively) for the neighbor cells is generated. The lists are generated in accordance with a database of controllers link-able with the designated active controller.
Abstract:
Un emplacement de base (304) combine un saut de fréquence dans la bande de base avec un saut de fréquence à synthétiseur rapide pour produire un système de communication à saut de fréquence économique (300). L'emplacement de base (304) combine la capacité de saut de fréquence à synthétiseur rapide des émetteurs (307-309) avec le saut de fréquence dans la bande de base pour produire un système de communication à saut de fréquence (300) qui dessert le même nombre d'abonnés desservi par les émetteurs (208-213) dans un système de communication à saut de fréquence exclusivement dans la bande de base (200), mais avec un nombre réduit d'émetteurs (307-309). La mise en oeuvre de cavités sélectives en fréquence (312-317) possédant une très faible perte élimine le besoin d'utiliser des combineurs hybrides à large bande (112-114), ce qui élimine à son tour la perte de puissance du signal transmis se produisant dans un système de communication à saut de fréquence exclusivement à synthétiseur rapide (100).