Method and system for simultaneous bi-directional wireless communication between user station and first and second base stations

A technology of user stations and base stations, applied in wireless communication, transmission systems, transmission control/equalization, etc., can solve problems such as base station performance problems

Inactive Publication Date: 2004-07-07
GOOGLE TECH HLDG LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This operation may cause performance problems at the base station, especially if the strongest signal comes from a base station operating at maximum transmit power or if strong intra-cell interference occurs

Method used

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  • Method and system for simultaneous bi-directional wireless communication between user station and first and second base stations
  • Method and system for simultaneous bi-directional wireless communication between user station and first and second base stations
  • Method and system for simultaneous bi-directional wireless communication between user station and first and second base stations

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Embodiment Construction

[0016] like figure 1 , Figure 2 and image 3 The multiple access communication system shown consists of radio communication with one of the image 3 A first base station 1 and a second base station 2 are shown communicating with portable, mobile subscriber stations.

[0017] The system is of the CDMA type and a subscriber station 3 is shown in synchronous communication with each of two base stations shown as 1 and 2 . This situation most notably exists when the subscriber station 3 is during a cell handover from one base station's cell to another. This synchronized communication between a subscriber station and multiple base stations is particularly useful for mobile subscriber stations because it enables so-called "soft handovers," in which a subscriber station that leaves the coverage of one base station and enters the coverage of a second base station cuts off Establishing communication with the first base station and the second base station synchronously prior to commun...

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Abstract

A method of communication between a user station and first and second base stations in which the user station is simultaneously in bi-directional wireless communication with said first and second base sttions, including a data transmission step in which an uplink signal including user data for communication to another user via the base stations is transmitted from said user station to said first and second base stations, said base station data (23) in said uplink signal including first items (26) that are processed selectively in said first base station (1) and second items (27) that are processed selectively in said second base station. The method is especially applicable when the user station is mobile, the method including a power control step in which the power of downlink signals transmitted by said base stations to the user station is controlled as a function of said data (23) in said uplink signal, the power of a first downlink signal transmitted by said first base station to said user station being controlled selectively as a function of said first item (26) and the power of a second downlink signal transmitted by said second base station to said user station being controlled selectively as a function of said second item (27).

Description

technical field [0001] The present invention relates to communication between a subscriber station (on the one hand) and first and second base stations (on the other hand), wherein the subscriber station is in synchronous two-way wireless communication with said first and second base stations. In particular, the present invention is applicable to a communication method comprising a data transmission step, in which an uplink including user data for communication to another user via a base station and base station data for communication to a first and a second base station A signal is transmitted from the subscriber station to the first and second base stations. Background technique [0002] This communication method can be applied, for example, to power control in a Code Division Multiple Access (CDMA) communication system. So-called "third generation" communication systems using CDMA are the subject of international standards such as the "3GPP" standards developed and publi...

Claims

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Application Information

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IPC IPC(8): H04B1/00H04B7/005
CPCH04W52/40H04W52/60
Inventor 卢卡斯·埃利斯吉弗雷聚·布莱兹法兰西斯·罗杰·戴维·格欧塞多鲁·卡林阿尔诺·塔凡
Owner GOOGLE TECH HLDG LLC
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