Method and apparatus for implementing multiuser equitable scheduling and pre-encode
A multi-user, precoding technology, applied in communication between multiple stations, diversity/multi-antenna system, space transmit diversity, etc., can solve the problem of inability to balance fair service, maximize system capacity delay, high complexity, Problems such as high complexity or processing delay, to achieve the effect of minimizing user interference, small amount of calculation, and reducing complexity
Inactive Publication Date: 2012-07-25
联想(上海)有限公司
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[0011] However, since this scheme is a non-linear method, the calculation of each user's transmission weight vector requires the information of other users, that is, each user's transmission weight vector is the result of global optimization, which leads to the complexity of the actual implementation Therefore, this scheme will bring excessive complexity or processing delay to the realization of the actual system
[0012] It can be seen that the various existing multi-user scheduling and precoding schemes have different problems in their specific implementation, and cannot balance the requirements of fair service, maximizing system capacity, and reducing delay.
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[0043] The basic idea of the present invention is: for all active users within a certain range, first calculate the maximum spatial subchannel gain of each active user's available spatial subchannel, then calculate the average gain of the maximum spatial subchannel gain of all active users, and find The dispersion degree of each active user and the average gain, and then calculate the channel correlation of the spatial channel of two users according to the ascending order of the dispersion degree, and select the user with a small correlation degree as the service user.
[0044] In the present invention, a certain range is based on the cell covered by each base station, and the base station completes all calculations and selects service users. The active users refer to the users who currently need the service provided by the base station, and the users in the idle standby state are not considered.
[0045] For the evaluation of channel correlation, the channel correlation thr...
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The present invention discloses a method which is used for realizing the fair scheduling and precoding of a plurality of users, and comprises the following steps: A. the base station acquires the channel information of each active user, and calculates the maximum spatial sub-channel gain of each active user according to the acquired channel information; B. the average gain of all the active usersand the dispersion between each active user and the average gain is calculated according to the acquired maximum spatial sub-channel gain of all the active users; and C. the channel relativity of twousers are calculated according to the ascending order of the dispersion, and the service user is selected according to the set rules. The present also discloses a device which is used for realizing the fair scheduling and precoding of a plurality of users. The method and the device can maximize the system capacity and simultaneously reduces the complexity of implementation, while guaranteeing therelatively fair scheduling.
Description
technical field [0001] The present invention relates to user scheduling technology, in particular to a method and device for realizing multi-user fair scheduling and precoding. Background technique [0002] With the rapid development of wireless communication technology, the serious shortage of spectrum resources has increasingly become a bottleneck to curb the wireless communication business. How to fully develop and utilize limited spectrum resources and improve the utilization rate of spectrum resources is one of the hot topics in the current communication field. Therefore, multiple-input multiple-output (MIMO) wireless communication technology emerges as the times require. The so-called MIMO technology means that for any wireless communication system, multiple antennas or antenna arrays are used at both the transmitting end and the receiving end to form a wireless MIMO system. If multiple users communicate using MIMO technology, a multi-user MIMO system is formed. [...
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IPC IPC(8): H04B7/06H04B7/26
CPCH04W48/16H04W88/08H04W72/12
Inventor 刘云辉张孝林李颖
Owner 联想(上海)有限公司