Method and device for realizing user scheduling
A user scheduling and user technology, applied in the field of communication, can solve problems such as complex interference, system performance degradation, and user scheduling accuracy degradation, so as to achieve overall performance improvement, avoid system performance degradation, and improve accuracy
Inactive Publication Date: 2012-02-08
ZTE CORP
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Problems solved by technology
[0007] Since the MU-MIMO technology is adopted in the LTE-A system, the pairing algorithm and the scheduling algorithm are not taken into account. Therefore, in the actual user scheduling, as the number of user pairs increases, the interference received by a single user becomes more complicated, resulting in user scheduling The correctness of the system is reduced, which will inevitably lead to a decrease in system performance
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[0046] When the system adopts MU-MIMO technology and a maximum of N users can be scheduled on the same time-frequency resource, it is necessary to consider the current channel characteristics of the users and the principle of fairness when performing multi-user scheduling, and finally determine the resources to be scheduled on this resource. User. In general, firstly, the joint measurement value of two or more users paired should be multiplied by a reduction factor, and the reduction factors used for the joint measurement value after pairing different numbers of users can be the same or different; after that, use The reduced metric value replaces the original joint metric value as the final scheduling basis.
[0047] The value of the reduction factor is less than or equal to 1, which is related to the channel environment where the system is located. In a given channel scenario, adopting an appropriate reduction factor can make the average spectral efficiency and edge spectral...
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The invention discloses a method and a device for realizing user scheduling. The measurement value of each user can be calculated, and the maximum measurement value and the corresponding user can be obtained; the maximum united measurement value of matched user combination under each matched user number and the corresponding matched user combination are respectively obtained; the obtained maximum scheduling measurement value and each maximum united measurement value are renewed by corresponding retrenchment factors; and the user or matched user combination corresponding to the maximum value in the renewed maximum measurement value and each maximum united measurement value are determined to be scheduled. The method and the device disclosed by the invention can limit the integral matching conditions when multiple users are matched, and multi-user matching can be carried out only when the integral performance after user matching is good enough so as to ensure that the integral performance of a system can still be improved when a user channel is interfered more complexly. A matching algorithm and a scheduling algorithm are both considered in the user scheduling, the correctness of the user scheduling is improved, and the reduction of system performance is avoided.
Description
technical field [0001] The present invention relates to the communication field, in particular to a method and device for realizing user scheduling. Background technique [0002] In wireless communication, as people's demand for multimedia and other services is getting higher and higher, it is required that the mobile communication system can provide higher data rate and system capacity. LTE utilizes OFDM technology, multi-antenna technology and precoding technology, which can better meet the user's high data rate requirements. [0003] However, with the introduction of LTE-A requirements, people pay more and more attention to the average spectrum efficiency of the cell and the spectrum efficiency of the cell edge. Both the uplink and downlink of the LTE system apply OFDM-based multiple access multiplexing. Different from the traditional wireless communication system with CDMA as the basic multiple access multiplexing method, the LTE system has no processing gain because t...
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Login to View More IPC IPC(8): H04W72/12
CPCH04W72/121H04W84/18
Inventor 田开波张晨晨李峰彭爱华
Owner ZTE CORP