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Multi-site MIMO cooperation in cellular networks

A cellular communication network and site technology, applied in the field of cellular communication systems, can solve problems such as high feedback overhead

Active Publication Date: 2012-11-28
BLACKBERRY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of this technique include that it can only be applied to high-geometry users, requires the pairing of two or more users served by the same base station and the transmitting site (e.g. base station) needs to know the channel conditions
This calculation results in high feedback overhead since channel condition data or information from which the transmitting site can calculate the channel condition must be transmitted from the mobile terminal

Method used

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  • Multi-site MIMO cooperation in cellular networks
  • Multi-site MIMO cooperation in cellular networks
  • Multi-site MIMO cooperation in cellular networks

Examples

Experimental program
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Embodiment Construction

[0023] With reference to the accompanying drawings, figure 1 A base station controller (BSC) 10 is shown controlling wireless communications within a plurality of cells 12 served by corresponding base stations (BS) 14 .

[0024] In some configurations, each cell is further divided into a number of sectors 13 or zones (not shown). Typically, each base station 14 facilitates communications with mobile and / or wireless terminals 16 located within the cell 12 associated with the corresponding base station 14 using OFDM. Movement of the mobile terminal 16 relative to the base station 14 causes significant fluctuations in channel conditions. As shown, base stations 14 and mobile terminals 16 may include multiple antennas to provide space diversity for communications. In some configurations, relay station 15 may facilitate communication between base station 14 and wireless terminal 16 . A wireless terminal 16 is capable of handover 18 from any cell 12 , sector 13 , sector (not show...

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PUM

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Abstract

A method of serving a given data stream to a target mobile terminal, in a cellular communications network that includes a plurality of transmitting sites wherein each transmitting site including at least one antenna, is provided. The method includes designating at least two of the plurality of transmitting sites as cooperating sites; assigning tones to each transmitting site from a sub-band associated with the cooperating sites; dividing the data stream into at least two sub-data streams, each of the sub-data streams for transmission over selected tones; and interlacing tones of the cooperating sites in accordance with a selected one of a time switching and a frequency switching transmit diversity technique. Other techniques for multi-site MIMO cooperation are also provided.

Description

technical field [0001] This application relates to cellular communication systems. More specifically, the present application relates to MIMO transmission technology between cell sites. Background technique [0002] A cellular network is divided into many small geographic areas called cells or sites. Each cell is adjacent to one or more cells. Collectively, the cells provide cellular service to a large geographic area. Each cell is typically served by one or more corresponding base stations. Within each cell, one or more corresponding base stations serve one or more mobile terminals (or mobile stations) located within that cell. As detailed further below, other devices such as relay stations, which assist in base station-mobile terminal communications, may also serve cells. [0003] Signals propagated through a given cell may include transmissions from devices within the cell (eg, mobile terminals and base stations within the cell), and may also include signals transmit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04B7/02H04B7/208H04W16/28H04W24/10
CPCH04B7/0697H04L5/0007H04L25/0204H04W16/02H04L25/0224H04L5/0035H04B7/0632H04B7/12H04B7/024H04B7/0417H04B7/0669
Inventor M.巴利J.马H.徐
Owner BLACKBERRY LTD