公开(公告)号：AT470328T

公开(公告)日：2010-06-15

申请号：AT07000998

申请日：2001-05-01

Applicant: MOTOROLA INC

Inventor： SPEAR STEPHEN L

IPC: H04B7/26 ,  H04W36/10 ,  H04W36/08 ,  H04W36/18 ,  H04W92/12

Abstract: A. method and system of generating neighbor cell lists in a cellular environment having a first cell (cell D) 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) 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 RNC 4, 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 linkable with the designated active controllcr.

公开(公告)号：GB2305081B

公开(公告)日：2000-02-09

申请号：GB9618140

申请日：1996-08-30

Applicant: MOTOROLA INC

Inventor： SPEAR STEPHEN L

IPC: H04J3/06 ,  H04L7/04 ,  H04L7/10 ,  H04W56/00 ,  H04W74/08 ,  H04Q7/30 ,  H04B7/212 ,  H04J3/16

公开(公告)号：DE3856308T2

公开(公告)日：1999-11-04

申请号：DE3856308

申请日：1988-11-07

Applicant: MOTOROLA INC

Inventor： SPEAR STEPHEN L

IPC: H04W36/08 ,  H04W36/38 ,  H04W76/02 ,  H04Q7/22 ,  H04B7/26

Abstract: An improved cellular telephone communication system is described having operational steps which prevent a call from being dropped due to a radiotelephone (130) not receiving a handoff instruction from its host base site (115). The system includes a switch controller (122) for determining that the radiotelephone requires a handoff from a first base site coverage area (110) to a second base site coverage area (112) and for communicating a handoff message to the associated first (115) and second base site equipment (119). 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.

公开(公告)号：CA2072373C

公开(公告)日：1998-10-06

申请号：CA2072373

申请日：1991-02-20

Applicant: MOTOROLA INC

Inventor： KOTZIN MICHAEL D ,  SPEAR STEPHEN L

IPC: H04B7/26 ,  H04J13/00 ,  H04J13/06 ,  H04W16/02 ,  H04W16/12 ,  H04W16/24 ,  H04J3/02 ,  H04B1/713

Abstract: In a TDMA cellular network, there is provided a mechanism for shared-carrier fre quency-hopping. It comprises: allocating on a frame basis within a reuse diameter to one coverage area (A-I) during certa in timeslot(s) at least one from a pool of TDM frame-hopped carriers and allocating on a frame basis within that carrier re use diameter to another coverage area (A-I) during certain other, substantially non-overlapping timeslot(s) that frame-hoppe d 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 dia meter 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 carr ier reuse diameter to another coverage area (A-I) another of that plurality of hopped carriers, all in time-synchronism with any p roximal reuse of that carrier. The control and access carriers may also be included in the hopping pool, causing certain timesl ots to be hopped on a sequence different from the others. The pool of hopped carriers is further apportioned among co-located site s into hopping groups, thereby reducing intra-system synchronization requirements. To solve the near/far problem, TDM ti meslots bordering hopping boundaries are preferentially allocated to less distant mobile users.

公开(公告)号：DE69113651T2

公开(公告)日：1996-05-09

申请号：DE69113651

申请日：1991-02-25

Applicant: MOTOROLA INC

Inventor： SPEAR STEPHEN L

IPC: H04B7/26 ,  H04W16/24 ,  H04Q7/22

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 is characterized by: periodically allocating some portion of a carrier (19A-24A) of radio traffic to one coverage area during one time interval and periodically allocating some other portion of that same carrier (19B-24B) 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 (8+8+5 APPROX 8+8+3+3) and the minimum channel capacity per coverage area is enhanced (8+8 => 8+8+3+3; 16 => 22).

公开(公告)号：AU663604B2

公开(公告)日：1995-10-12

申请号：AU4409393

申请日：1993-06-09

Applicant: MOTOROLA INC

Inventor： KOTZIN MICHAEL D ,  SPEAR STEPHEN L

IPC: H04B1/713 ,  H04B1/7136 ,  H04L27/30 ,  H04Q7/04

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).

公开(公告)号：FI941009A0

公开(公告)日：1994-03-02

申请号：FI941009

申请日：1994-03-02

Applicant: MOTOROLA INC

Inventor： KOTZIN MICHAEL D ,  SPEAR STEPHEN L

IPC: H04B1/713 ,  H04B1/7136 ,  H04B

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).

公开(公告)号：FR2687521A1

公开(公告)日：1993-08-20

申请号：FR9300281

申请日：1993-01-14

Applicant: MOTOROLA INC

Inventor： SPEAR STEPHEN L

IPC: H04W88/18

Abstract: A Time Division Multiple access radiotelephone system has a base transceiver that receives speech from, and sends speech to, the Public switched Telephone Network. The base transceiver encodes (CO, DEC) the speech in a 20 ms recurrent time slot for each associated mobile transceiver. The mobile transceivers transmit to the base transceiver on a paired full duplex radio link.

公开(公告)号：AU7191991A

公开(公告)日：1991-09-05

申请号：AU7191991

申请日：1991-02-26

Applicant: MOTOROLA INC

Inventor： WHITTINGTON CHARLES L ,  SPEAR STEPHEN L

IPC: H04J3/06 ,  H04Q7/04 ,  H04L7/00 ,  H04Q11/04

公开(公告)号：DE4105267A1

公开(公告)日：1991-08-29

申请号：DE4105267

申请日：1991-02-20

Applicant: MOTOROLA INC

Inventor： WHITTINGTON CHARLES L ,  SPEAR STEPHEN L

IPC: H04J3/06