公开(公告)号：JPH1188259A

公开(公告)日：1999-03-30

申请号：JP17604698

申请日：1998-06-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LYNCH MICHAEL A ,  ZAPPALA CHRISTOPHER F

IPC: H04B1/707 ,  H04B1/7115 ,  H04B7/08 ,  H04B7/10 ,  H04B7/26 ,  H04J13/02

Abstract: PROBLEM TO BE SOLVED: To provide an antenna system by which supply of a prescribed energy stream to each of pluralities of rake fingers in the code division multiple access CDMA system is compensated. SOLUTION: A CDMA base station 60 by this invention compensates a prescribed energy stream supplied to each of pluralities of rake fingers 110, 112,... and improves the gain. One side face of the base station includes pluralities of pairs of diversity antennas 62, 64,.... The energy from a 1st antenna of each pair is delayed and the energy from a 2nd antenna of each pair is not delayed. The added delay is larger than a tip time of the rake fingers. Signals from the antenna pairs are synthesized and converted into a digital form. The energy from all antennas is selected by each rake finger and the energy from each antenna is selected by any of the rake fingers. Then the energy from the rake fingers is synthesized into a single data stream.

公开(公告)号：JPH10243449A

公开(公告)日：1998-09-11

申请号：JP5452498

申请日：1998-02-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LYNCH MICHAEL A

IPC: H04W16/00 ,  H04W16/24 ,  H04Q7/36 ,  H04J13/00 ,  H04Q7/22 ,  H04Q7/28

Abstract: PROBLEM TO BE SOLVED: To simplify an equipment and to reduce a maximum number of pilot channels by making communication through 1st set of channels of CDMA channels at a 1st sector division level and making communication through 2nd set of channels of CDMA channels at a 2nd sector division level and differentiating the 1st and 2nd sets of channels and also the sector division levels. SOLUTION: Each cell site 108 of a base station 102 is handled as an omnidirectional cell for a pilot signal and a synchronizing signal sent from the base station 102 to a remote terminal. In this sector division system, a PN offset is assigned to each cell site, which supports one pilot channel. On the other hand, each cell site 108 is divided into three sectorial sectors each having an angle of 120 degrees. They are used for a forward link traffic channel used for transmission from the base station 102 to a remote terminal, a paging channel, a reverse link traffic channel and an access channel.

公开(公告)号：CA2227468C

公开(公告)日：2001-10-30

申请号：CA2227468

申请日：1998-01-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LYNCH MICHAEL A

IPC: H04W16/00 ,  H04W16/24 ,  H04Q7/22 ,  H04B7/216

Abstract: A base station of a code division multiple access (CDMA)-based communications network (e.g., one conforming to the IS-95 standard) is sectorized such that, a first subset of CDMA channels are communicated using a first level of cell-site sectorization and a second subset of CDMA channels, different from the first subset, are communicated using a second level of cell-site sectorization, different from the first level. For example, the first set of CDMA channels may be the pilot and sync channels and the second subset of CDMA channels may be the access, paging, and traffic channels. In one set of implementations, at the first sectorization level, each cell site is omnidirectional (for the first subset of CDMA channels), while, at the second sectorization level, each cell site is divided into two or more sectors (for the second subset of CDMA channels). In this set of implementations, each cell site is assigned one pseudo noise (PN) offset and transmits one pilot channel. In another set of implementations, at the first sectorization level, each cell site is divided into two or more sectors (for the first subset of CDMA channels), while, at the second sectorization level, each sector is further divided into two or more sub-sectors (for the second subset of CDMA channels). In this set of implementations, each sector is assigned one PN offset and each cell site transmits a different pilot channel for each sector. In either case, the present invention is able to provide certain advantages of sectorization (e.g., increased capacity and reduced interference) while reducing certain disadvantages of sectorization (e.g., pilot pollution, handoff processing). Moreover, the present invention can be implemented to support existing remote terminals (e.g., mobile,/cellular telephones) having three-finger RAKE receivers.

公开(公告)号：CA2227468A1

公开(公告)日：1998-08-19

申请号：CA2227468

申请日：1998-01-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LYNCH MICHAEL A

IPC: H04W16/00 ,  H04W16/24 ,  H04Q7/22 ,  H04B7/216

Abstract: A base station of a code division multiple access (CDMA)-based communications network (e.g., one conforming to the IS-95 standard) is sectorized such that, a first subset of CDMA channels are communicated using a first level of cell-site sectorization and a second subset of CDMA channels, different from the first subset, are communicated using a second level of cell-site sectorization, different from the first level. For example, the first set of CDMA channels may be the pilot and sync channels and the second subset of CDMA channels may be the access, paging, and traffic channels. In one set of implementations, at the first sectorization level, each cell site is omnidirectional (for the first subset of CDMA channels), while, at the second sectorization level, each cell site is divided into two or more sectors (for the second subset of CDMA channels). In this set of implementations, each cell site is assigned one pseudo noise (PN) offset and transmits one pilot channel. In another set of implementations, at the first sectorization level, each cell site is divided into two or more sectors (for the first subset of CDMA channels), while, at the second sectorization level, each sector is further divided into two or more sub-sectors (for the second subset of CDMA channels). In this set of implementations, each sector is assigned one PN offset and each cell site transmits a different pilot channel for each sector. In either case, the present invention is able to provide certain advantages of sectorization (e.g., increased capacity and reduced interference) while reducing certain disadvantages of sectorization (e.g., pilot pollution, handoff processing). Moreover, the present invention can be implemented to support existing remote terminals (e.g., mobile,/cellular telephones) having three-finger RAKE receivers.

公开(公告)号：CA2236315C

公开(公告)日：2001-07-31

申请号：CA2236315

申请日：1998-04-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ZAPPALA CHRISTOPHER F ,  LYNCH MICHAEL A

IPC: H04B1/707 ,  H04B1/7115 ,  H04B7/08 ,  H04B7/10 ,  H04B7/26 ,  H01Q1/00 ,  H01Q21/00 ,  H04B7/216 ,  H04Q7/22

Abstract: An improved CDMA base station for insuring a constant supply of energy to each of a plurality of rake fingers, thus improving gain. One aspe ct of the base station includes a plurality of pairs of diversity antennas. The energy from the first antenna of each pair is subjected to a delay while the energy from the second antenna of each pair is not subjected to a delay. The added delay is greater than the chip time of the rake fingers. The signals f rom each pair of antennas is combined and converted to digital form. The energy from all the antennas is then routed to the rake fingers, with the energy fr om each antenna being routed to one of the rake fingers. The energy from the rake fingers is then combined into a single data stream. In an alternative approach, the base station includes a plurality of diversity antennas. The energy from each of the diversity antennas is subjected to a different amoun t of delay. The delay difference must again be greater than the chip time of t he rake fingers. The energy from the antennas is combined, converted to digital format, and routed to each of a plurality of rake fingers, with the energy f rom each antenna being routed to the rake finger. The energy from the rake fingers is then combined into a single output data stream.

公开(公告)号：CA2236315A1

公开(公告)日：1998-12-23

申请号：CA2236315

申请日：1998-04-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ZAPPALA CHRISTOPHER F ,  LYNCH MICHAEL A

IPC: H04B1/707 ,  H04B1/7115 ,  H04B7/08 ,  H04B7/10 ,  H04B7/26 ,  H01Q1/00 ,  H01Q21/00 ,  H04B7/216 ,  H04Q7/22

Abstract: An improved CDMA base station for insuring a constant supply of energy to each of a plurality of rake fingers, thus improving gain. One aspect of the base station includes a plurality of pairs of diversity antennas. The energy from the first antenna of each pair is subjected to a delay while the energy from the second antenna of each pair is not subjected to a delay. The added delay is greater than the chip time of the rake fingers. The signals from each pair of antennas is combined and converted to digital form. The energy from all the antennas is then routed to the rake fingers, with the energy from each antenna being routed to one of the rake fingers. The energy from the rake fingers is then combined into a single data stream. In an alternative approach, the base station includes a plurality of diversity antennas. The energy from each of the diversity antennas is subjected to a different amount of delay. The delay difference must again be greater than the chip time of the rake fingers. The energy from the antennas is combined, converted to digital format, and routed to each of a plurality of rake fingers, with the energy from each antenna being routed to the rake finger. The energy from the rake fingers is then combined into a single output data stream.

公开(公告)号：MX9801271A

公开(公告)日：1998-08-30

申请号：MX9801271

申请日：1998-02-16

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LYNCH MICHAEL A

IPC: H04W16/00 ,  H04W16/24 ,  H04J1/00

Abstract: La presente invencion se refiere a una estacion base de una red de comunicaciones basada en acceso multiple con division de codigo (CDMA) (por ejemplo uno que cumple con la norma IS-95)se sectoriza de manera tal que el primer sub-conjunto de canales CDMA se comunica utilizando un primer nivel de sectorizacion de sitio celular y un segundo sub-conjunto de canales CDMA diferente del primer sub-conjunto, se comunica utilizando un segundo nivel de sectorizacion de sitio celular diferente del primer nivel. Por ejemplo, el primer conjunto de canales CDMA pueden ser los canales piloto y sincronizacion y el segundo subconjunto de canales CDMA pueden ser los canales de acceso, radio de localizacion y tráfico. En un conjunto de implementaciones en el primer nivel de sectorizacion, cada sitio celular es omnidireccional (para el primer sub-conjunto de canales CDMA) mientras que en el segundo nivel de sectorizacion, cada sitio celular se divide en dos o más sectores (para el segundo sub-conjunto de canales CDMA).En este conjunto de implementaciones, a cada sitio celular se asigna un desplazamiento de pseudo interferencia (PN) y transmite un canal piloto. En otro conjunto de implementaciones, en el primer nivel de sectorizacion, cada sitio celular se divide en dos o más sectores (para el primer sub-conjunto de canales CDMA) mientras que en el segundo nivel de sectorizacion, cada sector además de divide en dos o más sub-sectores (para el segundo sub-conjunto de canales CDMA). En este conjunto de implementaciones, a cada sector se asigna a un desplazamiento PN y cada sitio celular transmite un canal piloto diferente por cada sector. En cualquier caso, la presente invencion es capaz de proporcionar ciertas ventajas de sectorizacion (por ejemplo capacidad incrementada a interferencia reducida) mientras que se reducen ciertas desventajas de sectorizacion (por ejemplo contaminacion piloto, desplazamiento de transferencia). Aun más, la presente invencion puede implementarse para soportar terminales remotas existentes (por ejemplo teléfono moviles remotas existentes (por ejemplo teléfono moviles/celulares) que tienen receptores RAKE de tres dedos.