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Network MIMO system and signaling processing method thereof

A network and channel quality indication technology, applied in the field of network MIMO systems, can solve problems such as co-site assumption destruction

Inactive Publication Date: 2010-03-31
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing SUMIMO and MU MIMO codebook design methods cannot be directly used for network MIMO codebook design, because the co-site assumption is broken

Method used

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  • Network MIMO system and signaling processing method thereof
  • Network MIMO system and signaling processing method thereof
  • Network MIMO system and signaling processing method thereof

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Embodiment Construction

[0011] figure 1 is a schematic diagram illustrating a network MIMO system according to an exemplary embodiment of the present invention.

[0012] Such as figure 1 As shown, base station 1 - base station 7 form a super cell 1 through wired (such as optical fiber) or wireless means, and base station 8 - base station 15 form a super cell 2 through wired or wireless means. Such as figure 1 As shown, each supercell includes multiple base stations, and jointly performs resource scheduling, beamforming, and uplink and downlink signaling control of the multiple base stations. Each UE (e.g., figure 1 UE1-UE14) in the UE feed back signaling such as user channel information and resource application to each base station.

[0013] The codebook of station i (i.e., base station i) in each supercell consists of 2 B(i) size M i ×r (each column vector is the unit norm), where M i Indicates the number of antennas of station i (for example, the number of antennas of base station 1 is 2, wh...

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Abstract

The invention provides a network MIMO system and a signaling processing method thereof. The network MIMO system comprises a super honeycomb and a receiver, wherein the super honeycomb comprises a plurality of base stations; the receiver is used as a user device of a user and comprises a quantification unit, a precoding selector and a channel quality indicator counter, the quantification unit quantifies channel state information into elements t in a codebook based on the preset codebook, the precoding selector computes indexes of the elements t in the codebook, which is used as a precoding matrix index, the CQI counter counts channel quality indicators, the user devices send the precoding matrix index and the channel quality indictors to the base stations, wherein the elements t in the codebook are expressed by the following formula: t=Q*diag[wi]*uj, wi is elements in the codebooks among the base stations and is expressed by a p*r matrix, p is the number of the base stations of a stronglink found by the user device k, u and Q are shown in the formula, and L(i to k) expresses the large attenuation from the base station I to the user device k.

Description

technical field [0001] The present invention relates to a network MIMO system in a wireless communication system, more specifically, to a network MIMO system in a wireless communication system, a codebook design method and a control signaling processing method thereof. Background technique [0002] Network MIMO is a new cellular structure that is being intensively discussed in 3GPP LTE-Advanced (LET-Adanced). This technique requires accurate channel state information fed back from UE (User Equipment). Codebook-based channel state information feedback is very effective for FDD (Frequency Division Duplex) systems. There are codebook designs for SU (Single User) MIMO and MU (Multiple User) MIMO. However, co-site is assumed for SU MIMO and MU MIMO codebook design in open literature. For network MIMO, base stations are spatially separated (eg, 100 meters), which leads to new technical requirements for codebook design. The existing SUMIMO and MU MIMO codebook design methods ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08H04B1/707H04L25/03
CPCH04B7/0482H04B7/0626H04B7/0634
Inventor 周永行李华金成珍
Owner SAMSUNG ELECTRONICS CO LTD
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