公开(公告)号：DE602005002268T2

公开(公告)日：2008-05-29

申请号：DE602005002268

申请日：2005-05-26

Applicant: SYMBOL TECHNOLOGIES INC ,  GOREN DAVID P

Inventor： ZENG GUANG ,  GOREN DAVID P

IPC: G01S19/53 ,  G01S5/02

Abstract: A method for estimating a location of a wireless device in a wireless local network is provided. The method includes forming a first set comprised of the signal strength received from access points that the wireless device received a signal from and an indicator of no signal strength measured for access points that the wireless device did not receive a signal from. Next, a scan subset can be formed comprised of access points in the first set that has associated signal strength. Next, a cluster comprised of the calibration points can be formed based on the scan subset. A distance between the first set and each of the calibration point in the cluster can be calculated. Then, the smallest distance can be selected as the location estimate.

公开(公告)号：CA2575857A1

公开(公告)日：2006-02-23

申请号：CA2575857

申请日：2005-07-07

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： ZENG GUANG ,  WANG HUAYAN AMY

IPC: G01R31/08 ,  H04L12/403 ,  H04L12/413

Abstract: Described are a system and method for battery conservation in a wireless station. Initially, a wireless station switches, according to a predetermined time schedule, from a first communications mode into a second communications mode. The station is capable of at least one of receiving and transmitting data packets only when the station is in the second communications mode. The first mode is a power conservation mode. When the station is in the second mode, a wireless access point obtains a priority access to a radio channel. Then, the access point reserves the radio channel for wireless communications between the access point and the station. Wireless communications are conducted between the access point and the station over the radio channel. Upon a termination condition, the station switches into the first mode.

公开(公告)号：DE602005002268D1

公开(公告)日：2007-10-11

申请号：DE602005002268

申请日：2005-05-26

Applicant: SYMBOL TECHNOLOGIES INC ,  GOREN DAVID P

Inventor： ZENG GUANG ,  GOREN DAVID P

IPC: G01S19/53 ,  G01S5/02

Abstract: A method for estimating a location of a wireless device in a wireless local network is provided. The method includes forming a first set comprised of the signal strength received from access points that the wireless device received a signal from and an indicator of no signal strength measured for access points that the wireless device did not receive a signal from. Next, a scan subset can be formed comprised of access points in the first set that has associated signal strength. Next, a cluster comprised of the calibration points can be formed based on the scan subset. A distance between the first set and each of the calibration point in the cluster can be calculated. Then, the smallest distance can be selected as the location estimate.

公开(公告)号：AT371872T

公开(公告)日：2007-09-15

申请号：AT05754982

申请日：2005-05-26

Applicant: SYMBOL TECHNOLOGIES INC ,  GOREN DAVID P

Inventor： ZENG GUANG ,  GOREN DAVID P

IPC: G01S19/53 ,  G01S5/02

Abstract: A method for estimating a location of a wireless device in a wireless local network is provided. The method includes forming a first set comprised of the signal strength received from access points that the wireless device received a signal from and an indicator of no signal strength measured for access points that the wireless device did not receive a signal from. Next, a scan subset can be formed comprised of access points in the first set that has associated signal strength. Next, a cluster comprised of the calibration points can be formed based on the scan subset. A distance between the first set and each of the calibration point in the cluster can be calculated. Then, the smallest distance can be selected as the location estimate.

公开(公告)号：AU2005275352A1

公开(公告)日：2006-02-23

申请号：AU2005275352

申请日：2005-07-07

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： ZENG GUANG ,  WANG HUAYAN AMY

IPC: H04B7/216

Abstract: Described are a system and method for battery conservation in a wireless station. Initially, a wireless station switches, according to a predetermined time schedule, from a first communications mode into a second communications mode. The station is capable of at least one of receiving and transmitting data packets only when the station is in the second communications mode. The first mode is a power conservation mode. When the station is in the second mode, a wireless access point obtains a priority access to a radio channel. Then, the access point reserves the radio channel for wireless communications between the access point and the station. Wireless communications are conducted between the access point and the station over the radio channel. Upon a termination condition, the station switches into the first mode.

公开(公告)号：CA2568038A1

公开(公告)日：2005-12-15

申请号：CA2568038

申请日：2005-05-26

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： ZENG GUANG ,  GOREN DAVID P ,  VU HOAI XUAN

IPC: G01S19/53 ,  G01S5/02

Abstract: A method for estimating a location of a wireless device in a wireless local network is provided. The method includes forming a first set comprised of the signal strength received from access points that the wireless device received a signal from and an indicator of no signal strength measured for access points that the wireless device did not receive a signal from. Next, a scan subset can be formed comprised of access points in the first set that has associated signal strength. Next, a cluster comprised of the calibration points can be formed based on the scan subset. A distance between the first set and each of the calibration point in the cluster can be calculated. Then, the smallest distance can be selected as the location estimate.

公开(公告)号：AU2005250881A1

公开(公告)日：2005-12-15

申请号：AU2005250881

申请日：2005-05-26

Applicant: GOREN DAVID P ,  SYMBOL TECHNOLOGIES INC

Inventor： GOREN DAVID P ,  ZENG GUANG

IPC: G01S19/53 ,  G01S5/02

Abstract: A method for estimating a location of a wireless device in a wireless local network is provided. The method includes forming a first set comprised of the signal strength received from access points that the wireless device received a signal from and an indicator of no signal strength measured for access points that the wireless device did not receive a signal from. Next, a scan subset can be formed comprised of access points in the first set that has associated signal strength. Next, a cluster comprised of the calibration points can be formed based on the scan subset. A distance between the first set and each of the calibration point in the cluster can be calculated. Then, the smallest distance can be selected as the location estimate.

公开(公告)号：WO2006019625A3

公开(公告)日：2006-08-17

申请号：PCT/US2005024330

申请日：2005-07-07

Applicant: SYMBOL TECHNOLOGIES INC ,  ZENG GUANG ,  WANG HUAYAN AMY

Inventor： ZENG GUANG ,  WANG HUAYAN AMY

IPC: G01R31/08 ,  H04L12/403 ,  H04L12/413

CPC classification number: H04W52/0216 ,  H04W52/0248 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/142 ,  Y02D70/166 ,  Y02D70/23

Abstract: Described are a system and method for battery conservation in a wireless station. Initially, a wireless station switches, according to a predetermined time schedule, from a first communications mode (450) into a second communications mode (405). The station is capable of at least one of receiving and transmitting data packets (415) only when the station is in the second communications mode. The first mode is a power conservation mode (450). When the station is in the second mode (405), a wireless access point obtains a priority access to a radio channel (425). Then, the access point reserves the radio channel for wireless communications between the access point and the station. Wireless communications are conducted between the access point and the station over the radio channel (428, 440). Upon a termination condition, the station switches into the first mode (450).

Abstract translation: 描述了一种用于在无线站中进行电池保存的系统和方法。 最初，无线站根据预定的时间表从第一通信模式（450）切换到第二通信模式（405）。 仅当站处于第二通信模式时，该站才能够接收和发送数据分组（415）中的至少一个。 第一模式是省电模式（450）。 当站处于第二模式（405）时，无线接入点获得对无线电信道的优先权访问（425）。 然后，接入点保留用于接入点和车站之间的无线通信的无线电信道。 通过无线电信道（428,440）在接入点和站之间进行无线通信。 在终止条件下，站切换到第一模式（450）。