Multi-cell data transmission method and device

A data transmission, multi-cell technology, applied in diversity/multi-antenna system, shaping network in transmitter/receiver, space transmit diversity, etc. system and other issues to achieve the effect of simplifying the implementation complexity

Active Publication Date: 2010-10-27
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

Any change in the number of antenna ports makes the overhead required for quantization feedback also vary in a wide range, which will also increase the complexity of standard design
In addition, if the number of available antenna ports is too large, the uplink feedback overhead may exceed the range that the system can bear
[0007] It can be seen that whether it is for PMI-based feedback or quantized channel state information feedback, too many possible antenna ports will lead to an increase in the complexity of standard design, and at the same time increase the complexity of UE (system) implementation

Method used

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Embodiment Construction

[0056] In order to make the objectives, technical means and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings.

[0057] The basic idea of ​​the present invention is to limit the number of antenna ports participating in the cooperative transmission, thereby reducing the realization complexity of determining the data transmission mode in the multi-cell joint transmission.

[0058] The multi-cell data transmission method of the present invention includes a processing method on the network side and a processing method on the UE side. The two complete the entire data transmission mode determination and data transmission process through interaction. For the sake of clarity of description, in the following embodiments, the processing method on the network side and the processing method on the UE side are combined for introduction.

[0059] figure 1 This is a flowch...

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Abstract

The invention discloses a multi-cell data transmission method which comprises the following steps: for a UE, selecting a number N of antenna ports in a pre-determined antenna port number set, and determining the N antenna ports in all cells in a collaborative cell set of the UE; issuing the instruction information of the determined N antenna ports to the UE through at lease one cell in the collaborative cell set; and sending data to the UE through the N antenna ports. In addition, the invention also discloses a corresponding method process for the UE to receive data and the structures of network side equipment and the UE. The invention can reduce the complicacy of the UE and system realization in multi-cell data transmission.

Description

technical field [0001] The present invention relates to a multi-point coordinated transmission (COMP) technology, in particular to a method and device for multi-cell data transmission in COMP. Background technique [0002] The International Telecommunication Union (ITU) has put forward high requirements for the performance of the next-generation mobile communication system IMT-Advanced: the maximum system transmission bandwidth should reach 100MHz, and the peak rates of uplink and downlink data transmission should reach 500Mbps and 1Gbps respectively. Efficiency, especially edge spectral efficiency, presents very specific requirements. In order to meet the requirements of the new system of IMT-Advanced, 3GPP proposed the use of multi-point coordinated transmission technology in its next-generation mobile cellular communication system LTE-Advanced to improve the performance of the system. [0003] The coordinated multi-point transmission technology (COMP) is the cooperation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04L1/06H04B7/04
Inventor 高秋彬缪德山丁昱彭莹
Owner DATANG MOBILE COMM EQUIP CO LTD
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