Downlink transmission frequency division method for cooperating multipoint transmission system on the basis of service quality
A quality of service, multi-point transmission technology, applied in the field of downlink transmission frequency planning, can solve the problems such as the ineffective frequency planning effect and the lack of specific methods in the QoS frequency planning scheme.
Inactive Publication Date: 2014-01-29
BEIJING UNIV OF POSTS & TELECOMM
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[0005] However, at present, in the coordinated multi-point CoMP technology of the 3GPP long-term evolution architecture, the effect of frequency planning is not obvious, and no specific method has been proposed for the frequency planning scheme of QoS; development research
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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0025] It should be noted that the quality of service QoS requirements of the present invention include the user's transmission delay, throughput, etc., and each cell base station is located in the center of the cell, but the number of cells and the number of users included in the CoMP cellular system are all Real-time updates based on actual conditions are not limited to a specific structure.
[0026] The present invention is a coordinated multi-point transmission CoMP-based downlink transmission frequency planning method based on QoS: the base station distinguishes the service type ordered by the user terminal according to the test data from the user terminal to perform frequency planning; and also according to the acquired base station information of the adjacen...
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The invention relates to a downlink transmission frequency division method for cooperating a multipoint transmission CoMP system on the basis of service quality, comprising the steps: a base station differentiates the type of ordered services so as to carry out frequency division according to test data from a user terminal, and also selects cell set participating in cooperative transmission according to the acquired information of the base station adjacent to the cell and according to the receiving power of detected signals; when subcarriers are distributed, the base station set time delay limit of signal transmission firstly, then the transmission time delay and the time delay limit of signals are compared, and real-time users and non-real-time users are differentiated; then the subcarriers are distributed according to the proportion fairness principle, and the feedback of the user terminal is received; firstly the user terminal for the real-time service acquires the substrates with good transmission quality according to the QoS priority order of the users; and then the remaining subcarriers are distributed to the user terminal for non-real-time service. In the downlink transmission frequency division method, not only are different requirements of users for bandwidth and time delay solved, the interference among the users of adjacent cells is also reduced, and the performance of edge-cell users is also improved.
Description
technical field [0001] The invention relates to a downlink transmission frequency planning method based on quality of service for a coordinated multipoint transmission CoMP system in the third generation mobile communication partnership project 3GPP (The3rd Generation Partnership Project) Release9, and belongs to the technical field of mobile communication. Background technique [0002] Coordinated Multipoint Transmission CoMP (Coordinated Multipoint Transmission / Reception) technology is a coordinated transmission function between cell base stations defined by 3GPP R9; it uses optical fiber-connected antenna sites to cooperate with each other to provide services for users, because several adjacent antennas Sites or nodes serve one user at a time, thereby increasing the data rate for edge users. [0003] The base station needs to provide quality of service (QoS) guarantees to provide information services for user terminals. The development trend of wireless communication als...
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IPC IPC(8): H04W16/14H04W16/18H04W72/04
Inventor 王晓湘田辉郑立芝王玉龙张鸿涛
Owner BEIJING UNIV OF POSTS & TELECOMM