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Wireless communication in cooperative cell

A technology of wireless communication and wireless communication system, applied in the field of wireless communication system

Inactive Publication Date: 2017-07-07
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both methods require more sending resources

Method used

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  • Wireless communication in cooperative cell
  • Wireless communication in cooperative cell
  • Wireless communication in cooperative cell

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Embodiment Construction

[0075] Before describing the embodiments of the present invention, some specific details about MIMO transmission technology in LTE will be given first.

[0076] As already outlined in the introduction, there may be various MIMO transmission schemes in LTE-based wireless communication systems, and as mentioned, reference signals may be used to allow UEs to measure channels and provide feedback to base stations. For CRS-based schemes, the phase / amplitude reference for each antenna port is derived from a linear combination of common reference signals. Another possibility for DMRS-based schemes is to provide the receiver with dedicated reference signals for each port.

[0077] Further details of several schemes used in LTE are provided below:

[0078] Precoding using spatial multiplexing of antenna ports with UE-specific reference signals (from 3GPPTS36.211 above)

[0079]

[0080] The mapping between antenna ports and physical antennas can be shown by:

[0081]

[0082] ...

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Abstract

A method of wireless communication comprising: providing one or more base stations (101, 102), each base station having at least one of a plurality of antenna sets, each antenna set serving a different geographical area; configuring (S40) the antenna sets for operating a plurality of antenna ports to at least perform data transmission (S50); receiving at a subscriber station (20) in wireless communication with at least one base station a data transmission specific to said subscriber station. The data transmission utilizes joint transmission of at least two of the antenna ports, transmit diversity is applied between the at least two antenna ports, and at least two of the at least two antenna ports are from a plurality of antenna sets of different antenna set configurations. The antenna ports may correspond to different cells, and the subscriber station (20) preferably provides separate feedback (S10) for each cell.

Description

technical field [0001] The present invention relates to wireless communication systems, such as systems based on the 3GPP Long Term Evolution (LTE) and 3GPP LTE-A groups of standards. Background technique [0002] Wireless communication systems are well known in which a base station (BS) communicates with user equipment (UE), also called a subscriber or mobile station, within the coverage area of ​​a base station (BS). [0003] The geographic area covered by a base station is often referred to as a cell, and many BSs are typically placed in place to form a network that covers a wide geographic area more or less seamlessly with adjacent and / or overlapping cells. (In this specification, the terms "system" and "network" are used synonymously). In more advanced systems, the concept of a cell can also be used in different ways: for example, defining a set of radio resources (such as a given bandwidth around a carrier center frequency) with associated identities that can be used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/024H04B7/0413
CPCH04B7/024H04B7/0413H04B1/7115H04B7/0617H04B7/0691H04W84/042
Inventor T·莫斯利
Owner FUJITSU LTD
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