A channel state information transmission method and device supporting fd-mimo
A technology of channel state information and configuration information, which is applied in the field of communication, can solve problems such as unfavorable long-term development of the system, inability to adapt to changes in accuracy and feedback, and increased system development and maintenance costs.
Active Publication Date: 2018-06-05
DATANG MOBILE COMM EQUIP CO LTD
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[0011] For example, in order to better support antenna arrays containing hundreds of antenna elements, antennas supporting 2 antenna ports, 4 antenna ports, 8 antenna ports, 16 antenna ports, 32 antenna ports, 64 antenna ports and 128 antenna ports are designed. Codebooks, and storing these codebooks, these require a lot of codebook design work and storage space, and as larger-scale antenna arrays are continuously implemented in products, new codebook design work is required; this will seriously increase System development and maintenance costs are not conducive to the long-term development of the system
[0012] Third, different codebook accuracies are required in different scenarios. A fixed codebook quantization accuracy is fixed and cannot be adaptively changed in terms of accuracy and feedback amount.
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[0158] In order to adaptively support FD-MIMO transmission with different numbers of ports in different application scenarios without increasing development and maintenance costs, in the embodiment of the present invention, the reconfigurable pilot for different numbers of ports FD-MIMO , codebook and feedback scheme.
[0159] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0160] refer to Figure 4 As shown, in the embodiment of the present invention, the detailed flow of the network side (eg, base station) receiving the channel state information reported by the terminal is as follows:
[0161] Step 400: The network side determines the corresponding codebook configuration parameters according to the service type information reported by the terminal, and sends the codebook configuration parameters to the terminal, instructing the terminal to generate a corresponding codebook based on the codeboo...
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The invention relates to the communication field, and discloses a channel state information transmission method and device supporting FD-MIMO. It is used to adaptively support FD‑MIMO transmission with different numbers of ports in different application scenarios without increasing development and maintenance costs. The method is as follows: the network side sends the codebook configuration parameters to the terminal according to the service type information reported by the terminal, so that the terminal generates a unique codebook according to the obtained codebook configuration parameters, and then sends a pilot signal to the terminal, and the terminal The pilot signal is used for downlink signal measurement, and the corresponding PMI is selected from the generated codebook according to the measurement results for feedback. In this way, FD-MIMO transmission with any number of ports and downlink channels with antenna arrays of any size and shape can be supported. Measurement and channel state information feedback, the whole solution has strong compatibility and high reliability, and improves the overall performance of the system without increasing development and maintenance costs.
Description
technical field [0001] The invention relates to the communication field, in particular to a channel state information transmission method and device supporting FD-MIMO. Background technique [0002] In the Long Term Evolution (LTE) system and the Long Term Evolution-Advanced (LTE-A) system, different ports are designed for different numbers of ports (for example, 2 antenna ports, 4 antenna ports, and 8 antenna ports). downlink codebook. In the LTE Rel-8 system, a closed-loop precoding technique is introduced to improve spectrum efficiency. To adopt the closed-loop precoding technology, firstly, both the base station and the terminal are required to save the same set of precoding matrices, which is called a codebook. The terminal measures the downlink channel based on the downlink measurement pilot, for example, the common reference signal (Cell-specific reference signal, CRS) or the channel state information reference signal (channel state information reference signal, CSI...
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IPC IPC(8): H04B7/06H04L1/06H04L1/00
Inventor 田园张然然高秋彬拉盖施
Owner DATANG MOBILE COMM EQUIP CO LTD