Downlink data transmission method and base stations
A transmission method and downlink data technology, applied in diversity/multi-antenna systems, location diversity, electrical components, etc., can solve problems such as interference of adjacent cell terminals and low throughput of edge terminals, and achieve the effect of reducing interference and improving throughput
Active Publication Date: 2013-01-30
ZTE CORP
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[0004] The present invention provides a downlink data transmission method and a base station to solve the problems of low throughput of edge terminals and interference between adjacent cell terminals
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[0041] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0042]The embodiment of the present invention proposes a downlink data transmission method based on a distributed networking CoMP manner. According to the test report of the terminal, the system judges that after the terminal enters the CoMP area, the dedicated bearer of the terminal will be dismantled and built according to the actual needs, and the bearer will be established according to the traffic demand such as the guaranteed bit rate (GBR) demand and the actual situation (mainly load) distribution of each cell. In the CoMP cell. After the distributed bearer mode is est...
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The invention provides a downlink data transmission method and base stations, which are applied to a coordinated multi-point transmission (CoMP) cell, wherein the CoMP cell comprises a master control cell and coordination cells. The method comprises the following steps of: using the base station of the master control cell to calculate and obtain dispatching information of the two cells according to channel estimation information of the current terminal, which is measured by the base stations of the two cells where the current terminal is located, wherein the dispatching information comprises a beam forming (BF) weight value; and using the base station of the master control cell to send the dispatching information of the coordination cells where the current terminal is located to the base stations of the coordination cells, and performing double-current BF transmission by the base stations of the two cells according to the dispatching information of the respective cells. According to the downlink data transmission method and the base stations, the throughput of the edge terminal is increased by downlink double-current BF transmission, and the interference of neighbor cells on the edge terminal is reduced.
Description
technical field [0001] The invention relates to multi-point coordinated transmission technology, in particular to a downlink data transmission method and a base station. Background technique [0002] Cooperative Multi-Point transmission (CoMP) is a technical means to improve the throughput of cell edge terminals and the throughput of the entire network. [0003] In the traditional coordinated multi-point transmission technology, all terminal information is stored in the main cell, terminal scheduling and other processes are all carried out in the main cell, and the data allocated by the main cell scheduling and the control information mapped by the physical layer code are transmitted to the main cell through the X2 interface. Cooperating cell, and then the cooperating cell handles it completely according to the will of the main cell. During the CoMP transmission process, the cooperating cell only provides a physical channel for the main cell, and does not participate in the ...
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IPC IPC(8): H04W24/00H04W72/12
CPCH04B7/024H04W92/20H04W72/1278H04W24/00H04W72/12H04W16/28H04W72/20
Inventor 赵瑜
Owner ZTE CORP