Downlink transmission control method and device of cooperative multicast system
A multi-point transmission and device pairing technology, applied in transmission systems, digital transmission systems, radio transmission systems, etc., can solve the problem of inability to accurately estimate the signal-to-noise ratio, the user side does not know the preprocessing weight value, and the downlink transmission control efficiency cannot be guaranteed and other issues to achieve the effect of improving throughput and optimizing downlink resource allocation
Active Publication Date: 2012-12-05
CHINA MOBILE COMM GRP CO LTD
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[0015] The inventors of the present application found that in the downlink transmission of the coordinated multi-point transmission system, since the user signal needs to be weighted and pre-processed at the sending end, the user side does not know the pre-processing weight value, and only uses the downlink channel H estimated by the common pilot Matrix and receiver detection schemes cannot accurately estimate the signal-to-noise ratio SINR after detection 2 , so that the MCS level corresponding to each frequency domain resource block cannot be accurately determined, and the efficiency of downlink transmission control cannot be guaranteed
Therefore, the existing non-cooperative downlink transmission control scheme cannot be directly applied in the coordinated multi-point transmission system
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[0047] The embodiment of the present invention provides a downlink transmission control technology for a coordinated multi-point transmission system. On the base station side, after user pairing, joint resource allocation and preprocessing weight value, the MCS level of the scheduled user channel is determined to provide an MCS The level of accuracy can optimize the allocation of downlink resources and further improve the throughput of the system.
[0048] see figure 2 As shown, in a cooperative system, the device responsible for joint signal processing may be set on one of the base stations, or may be set on an independent network entity. The device responsible for joint processing of signals is responsible for controlling uplink transmission and downlink transmission of coordinated multi-point transmission.
[0049] like Figure 4 As shown, the embodiment of the present invention takes M base stations as an example to form a cooperative group for illustration, and the com...
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A method for controlling the downlink transmission and a device for the signal associated processing in the coordinated multi-point transmission system are provided, which relate to the mobile communication technology, for optimizing the downlink transmission control in the coordinated multi-point transmission system. The embodiment aims at the coordinated multi-point transmission system, and in the base station side according to the SINR1 level of the frequency domain resource block fed back by the user, the mating result of the user, the associated resource allocation result and the pretreatment weight value result, determines the Modulation and Coding Scheme (MCS) level of the scheduled user channel to provide the accuracy of the MCS level, thus optimizing the downlink resource configurations, further increasing the throughput of the system.
Description
technical field [0001] The present invention relates to mobile communication technology, in particular to a cooperative multi-point transmission technology. Background technique [0002] The LTE (Long Term Evolution, Long Term Evolution) evolution (LTE-Advanced) system will adopt OFDMA (Orthogonal Frequency Division Multiple Access, Orthogonal Frequency Division Multiple Access) access mode, and the information of users in the cell is carried in mutually orthogonal different subcarriers, thereby avoiding multiple access interference among users. However, the OFDMA access method itself does not have the ability to suppress inter-cell interference, so the interference that affects the performance of the LTE-Advanced system mainly comes from adjacent cells, that is, inter-cell interference. At the same time, in order to obtain a higher spectrum utilization rate, the LTE-Advanced system will adopt the same-frequency networking method or a networking method with a frequency reus...
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IPC IPC(8): H04W28/08H04W72/04H04W72/54
CPCH04B7/024H04L1/0001H04L1/0025H04L1/0003H04W72/082H04L1/0009H04J11/0053H04L5/0025H04B7/0617H04B17/006H04L5/0037H04L1/20H04B17/336H04W72/541H04W16/14H04W16/04H04W72/1273H04L25/03305H04L25/03331
Inventor 王启星姜大洁刘光毅
Owner CHINA MOBILE COMM GRP CO LTD