Downlink Resource Allocation Algorithm Based on Channel Fluctuation Sensing in LTE System
A resource allocation and channel technology, applied in wireless communication, electrical components, etc., can solve the problems of not considering the user channel fluctuation, only considering the user's instantaneous channel quality, loss, etc., to improve user video experience and improve system throughput. Effect
Active Publication Date: 2020-03-17
XI AN JIAOTONG UNIV
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[0004] However, the current scheduler is still flawed
Existing scheduling algorithms only consider the user's instantaneous channel quality when performing resource allocation, and do not consider the user's channel fluctuation; as a result, some users have not been scheduled due to poor channel conditions during resource allocation, and these users are missed. Possibility of scheduling a time slot with a better channel condition than its own
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[0049] The present invention will be further described in detail below in conjunction with specific implementation, which is an explanation of the present invention rather than a limitation.
[0050] see figure 1 , the downlink resource allocation algorithm of channel fluctuation perception under the LTE system provided by the present invention includes the following operations:
[0051] 1) In the current scheduling time slot, count the channel quality CQI of each user on the RB for the first N (such as 1000) scheduling time slots of the current time slot for the RB to be allocated, and calculate the first N (such as 1000) of each user The maximum value, minimum value and average value of the CQI on the RB for a time slot;
[0052] 2) Using the maximum value, minimum value and average value of the CQI of the user's first N (such as 1000) time slots on the RB obtained in step 1), combined with the CQI of the current scheduled time slot user on the RB to calculate the impact of...
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The invention discloses a downlink resource allocation algorithm for channel fluctuation perception in an LTE system. First, the channel fluctuation situation of each user on the current RB to be allocated is counted, and combined with the current channel quality status of the user, the channel fluctuation influence factor is calculated based on classical resources. The scheduling index obtained by the allocation algorithm is multiplied by the channel fluctuation impact factor to obtain the scheduling index of the channel fluctuation-aware resource allocation algorithm; the RB is allocated to the user with the largest scheduling index, and if the remaining transmission data of the user is not greater than the transmission capacity of the RB, After the RB allocation is completed, the user is deleted from the queue to be scheduled; the RBs are allocated one by one, and if there is no data to be transmitted in the current time slot, the remaining RBs are allocated according to MAX C / I. The present invention is based on a classic resource allocation algorithm and considers user channel quality fluctuations, and can effectively improve system throughput and user video experience in an LTE system.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a downlink resource allocation algorithm for channel fluctuation perception in an LTE system. Background technique [0002] With the continuous improvement of wireless access rate, the types of mobile communication services gradually evolve from pure voice and common data services to rich multimedia services, mainly video services. The more complex business structure requires great changes in network performance, requiring the underlying network to provide higher communication rates and smaller transmission delays. Therefore, under the premise of limited resources, effective resource allocation among multiple users to increase system throughput and improve user video experience has become a research hotspot. [0003] At present, the more classic wireless resource allocation methods include: RR (Round Robin, polling) algorithm, MAX C / I (Maximum Carrier to Interferenc...
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IPC IPC(8): H04W72/12
CPCH04W72/1273H04W72/542
Inventor 王静刘贵忠贺丽君陈雨辰邓瑞
Owner XI AN JIAOTONG UNIV