公开(公告)号：ES2317545T3

公开(公告)日：2009-04-16

申请号：ES06755025

申请日：2006-05-04

Applicant: ERICSSON TELEFON AB L M

Inventor： HAARTSEN JACOBUS

IPC: H04B7/26 ,  H04W16/26 ,  H04W88/08

Abstract: Un método para operar una estación móvil (240) en un sistema de telecomunicaciones (225), comprendiendo el método: comunicarse directamente con una estación base (220) a través de un primer canal; caracterizado por recibir una instrucción para difundir una ráfaga; difundir una ráfaga (513) para su recepción por una pluralidad de estaciones de retransmisión (230-235), usándose la ráfaga para medir características indicativas de una calidad de recepción que permita la selección de la estación de retransmisión más pertinente; y establecer una conexión por un segundo canal con una de la pluralidad de estaciones de retransmisión (230-235); comunicarse indirectamente con la estación base (220) a través del segundo canal establecido con dicha una de la pluralidad de estaciones de retransmisión (230-235).

公开(公告)号：DE69837341T2

公开(公告)日：2007-12-13

申请号：DE69837341

申请日：1998-09-15

Applicant: ERICSSON TELEFON AB L M

Inventor： HAARTSEN JACOBUS

IPC: H04L12/28 ,  H04L12/56 ,  H04M3/58 ,  H04W52/02 ,  H04W76/02 ,  H04W84/18 ,  H04W84/20 ,  H04W88/06 ,  H04W92/02

Abstract: A first wireless unit engages in contemporaneous participation in a plurality of wireless networks. A connection is established with a second wireless unit in a first wireless network. Then, a hold time-out period is determined, and the first wireless unit enters a hold mode with respect to the first wireless network. While in hold mode, the first wireless unit establishes a connection with a third wireless unit in a second wireless network. This may include the first wireless unit paging the third wireless unit and acting as a master unit in the second wireless network. Alternatively, the first wireless unit may periodically listen for paging messages from a master unit, and respond when paged, thereby becoming a slave in the second wireless network. The first wireless unit then participates in activities in the second wireless network. Upon expiration of the hold time-out period, the first wireless unit resumes active participation in the first wireless network. This may include determining a second hold time-out period to be used in connection with the second wireless network, and entering a hold mode with respect to the second wireless network.

公开(公告)号：DE69929995D1

公开(公告)日：2006-04-27

申请号：DE69929995

申请日：1999-10-01

Applicant: ERICSSON TELEFON AB L M

Inventor： HAARTSEN JACOBUS

IPC: H04B1/713 ,  H04J13/00 ,  H04W52/02 ,  H04W68/00

Abstract: Establishing a connection between a paging unit and a standby unit in a channel hopping communications system includes activating the standby unit for an activation time period out of every standby time period. During each activation time period, the standby unit monitors a selected channel for receipt of a paging message. The selected channel is selected from a plurality of channels, and, for each subsequent activation time period, the selected channel is a subsequent one of the plurality of channels as specified by a hopping sequence and an internal clock. A page train is repeatedly transmitted from the paging unit to the standby unit, until a response is received from the standby unit. Each page train includes a plurality of paging messages, each paging message being transmitted on a different one of a subset of the plurality of channels. Selection of a page train for transmission by the paging unit may be based on an estimate of the standby unit's internal clock. The generation of page trains can be further optimized for those cases in which more than two page trains will be transmitted. The purpose of the optimization is to generate page trains that, when transmitted, are most likely to elicit an early response from the paged unit.

公开(公告)号：MY121617A

公开(公告)日：2006-02-28

申请号：MYPI9701104

申请日：1997-03-15

Applicant: ERICSSON TELEFON AB L M

Inventor： HAARTSEN JACOBUS

IPC: H04L7/00 ,  H04B1/7075 ,  H04L7/04

Abstract: THE INVENTION RELATES TO SYNCHRONIZING IN COMMUNICATION SYSTEMS BY USING A SEQUENTIAL CORRELATION TECHNIQUE. A DIGITAL SEQUENCE KNOWN TO THE RECEIVER, A SO-CALLED SIGNATURE, IS ALLOCATED A PLURALITY OF SEGMENTS. THE SEGMENTS ARE CORRELATED, SEGMENT FOR SEGMENT, IN A CORRELATOR (300) WHICH IS EQUALLY AS LONG AS THE SEGMENT. THE SEGMENTS MAY HAVE THE SAME OR DIFFERENT BIT PATTERNS. WHEN A FIRST SEGMENT IS RECEIVED IN THE CORRELATOR (300) AND THE CORRELATION VALUE OF THIS SEGMENT EXCEEDS AN ASSOCIATED THRESHOLD VALUE, THE SEGMENT IS ACCEPTED AS RECEIVED AND IS SAVED IN A MEMORY (308) IN RESPONSE TO A SIGNAL FROM THE CONTROL UNIT (311). A TIMER (319) IS SET TO A TIME POINT THAT CORRESPONDS TO THE LENGTH OF THE SEGMENTS. THERE IS THEN CORRELATED A SECOND SEGMENT WHOSE CORRELATION VALUE ON THE SIGNAL FROM THE TIMER (319) IS ADDED (304) TO THE VALUE STORED IN THE MEMORY (308). IF THE SUM EXCEEDS AN ASSOCIATED THRESHOLD VALUE, THE SUM IS STORED IN THE MEMORY (308). DETECTION CONTINUES IN THIS WAY. WHEN THE SUM OF THE CORRELATION VALUES OF ALL SEGMENTS HAVE EXCEEDED THE THRESHOLD VALUE OF THE LAST SEGMENT, THERE IS GENERATED A SYNC. TIME PULSE SIGNAL (TS). SHOULD A THRESHOLD VALUE NOT BE EXCEEDED, IT IS ASSUMED THAT A WRONG SIGNATURE HAS BEEN RECEIVED, AND DETECTION OF THE FIRST SEGMENT IS RE-COMMENCED.

公开(公告)号：DE69833019D1

公开(公告)日：2006-02-02

申请号：DE69833019

申请日：1998-10-06

Applicant: ERICSSON TELEFON AB L M

Inventor： HAARTSEN JACOBUS

IPC: H04B1/713 ,  H04B1/7143

Abstract: A frequency hopping generator comprises an XOR processing module and a PERM (permutation) processing module arranged in series. The XOR and PERM modules act directly on input clock lines as a function of a selection address. The hopping number sequence generated by the frequency hopping generator can be changed in real-time by changing the selection addresses, while the phase of the sequence can be changed in real-time by changing the clock value on the clock lines. The frequency generator finds exemplary use in rapidly switching between different piconets in a wireless scatter network.

公开(公告)号：DE69734009D1

公开(公告)日：2005-09-22

申请号：DE69734009

申请日：1997-12-19

Applicant: ERICSSON TELEFON AB L M

Inventor： HAARTSEN JACOBUS ,  DENT PAUL

IPC: H04W52/02 ,  H04B7/26 ,  H04B1/713

Abstract: Establishing a connection between a paging unit and a standby unit in a channel hopping communications system includes activating the standby unit for an activation time period out of every standby time period. During each activation time period, the standby unit monitors a selected channel for receipt of a paging message. The selected channel is selected from a plurality of channels, and, for each subsequent activation time period, the selected channel is a subsequent one of the plurality of channels as specified by a hopping sequence and an internal clock. A page train is repeatedly transmitted from the paging unit to the standby unit, until a response is received from the standby unit. Each page train includes a plurality of paging messages, each paging message being transmitted on a different one of a subset of the plurality of channels. Selection of a page train for transmission by the paging unit may be based on an estimate of the standby unit's internal clock.

公开(公告)号：DE69632147D1

公开(公告)日：2004-05-13

申请号：DE69632147

申请日：1996-12-19

Applicant: ERICSSON TELEFON AB L M

Inventor： HAARTSEN JACOBUS

IPC: H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04L29/06 ,  H04L29/08 ,  H04Q7/32 ,  H04Q7/22 ,  H04L12/28

Abstract: A retransmission method is disclosed wherein retransmissions over the sensitive link of the connection only involves packets that were actually disturbed in the sensitive link. At the same time, required storage capacity in the relay stations connecting the sensitive link to the nonsensitive link is reduced. Errors occurring in the sensitive part of the connection will cause retransmission over nonsensitive links of the connection as well, but this is considered to be of less importance since the nonsensitive links have a high throughput and/or low costs.

公开(公告)号：AU2003249869A1

公开(公告)日：2004-01-23

申请号：AU2003249869

申请日：2003-06-25

Applicant: ERICSSON TELEFON AB L M

Inventor： HAARTSEN JACOBUS

IPC: H04B1/713

公开(公告)号：AU751892B2

公开(公告)日：2002-08-29

申请号：AU3857099

申请日：1999-04-01

Applicant: ERICSSON TELEFON AB L M

Inventor： HAARTSEN JACOBUS

IPC: H04B1/713 ,  H04B7/26 ,  H04W48/14 ,  H04W56/00 ,  H04Q7/38

Abstract: An uncoordinated frequency hopping cellular system includes a mobile unit and a number of base stations. The mobile unit determines which base stations are in a geographical location defined by a location of the mobile unit. This determination is made by transmitting one or more inquiry messages, and receiving response information transmitted by responding base stations. The mobile unit then selects, for use by the mobile unit, one of the base stations from the set of base stations. Each of the base stations receives at least one of the inquiry messages, and transmits the response information to the mobile unit in response to the at least one received inquiry message. The mobile unit determines synchronization information from the response information, and uses this to establish communication with the selected base station.

公开(公告)号：PL183699B1

公开(公告)日：2002-06-28

申请号：PL32896797

申请日：1997-03-13

Applicant: ERICSSON TELEFON AB L M

Inventor： HAARTSEN JACOBUS

IPC: H04B1/7075 ,  H04L7/00 ,  H04L7/04 ,  H04J3/06 ,  H04B7/26