Data retransmission control method and system

A technology for data retransmission and retransmission, applied in the field of communication, can solve the problems of the absence of a data retransmission mechanism, unfavorable users to carry out accurate and efficient communication services, and unfavorable performance of multi-user MIMO systems to improve user satisfaction, etc. The effect of improving communication accuracy and improving user satisfaction

Inactive Publication Date: 2011-10-12
ZTE CORP
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Problems solved by technology

[0005] The above characteristics make the multi-user MIMO system have broad development prospects, but there is no data retransmission mechanism in the current multi-user MIMO system, which is not conducive to users to carry out accurate and efficient communication services, and does not take advantage of the multi-user MIMO system performance and user satisfaction. degree of improvement

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  • Data retransmission control method and system
  • Data retransmission control method and system

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Embodiment Construction

[0043] see figure 1 , figure 1 It is a schematic diagram of operation of TDD downlink multi-user MIMO. figure 1 Two users are taken as an example in the example, but it may be multi-user in actual application. figure 1 Among them, the transmitter can estimate the uplink channel according to the TDD channel reciprocity to obtain the downlink channel matrix of the two users, and can calculate the transmitter weights of the two users according to the downlink channel matrix of the two users, and then use the obtained weighted transmission of the corresponding user data.

[0044] In addition, in order to ensure that the receiving end can perform correct follow-up processing on the received user data, the transmitting end will respectively feed back the transmitting end weights of the two users to the corresponding users.

[0045] It should be noted that, in the multi-user MIMO mode, the signals of multiple users can be separated and the interference can be removed by designing ...

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Abstract

The invention discloses a data retransmission control method and a data retransmission control system. The data retransmission control method comprises the following steps of: dividing users into at least two user groups according to communication quality, and selecting one user from each user group for user pairing; transmitting the user data of the paired users by using a transmitter, and receiving the user data of the paired users by using a receiver; determining the data of all the paired users is required to be retransmitted in combination with the data checking operation of the receiver when the user data of high-communication quality users in the paired users has errors; and determining the user data of low-communication quality users is required to be retransmitted when the user data of the low-communication quality users in the paired users has the errors. By the method and the system, a data retransmission mechanism in a multi-user multiple input and multiple output system is provided, the communication accuracy of the multi-user multiple input and multiple output system can be improved, and the degree of satisfaction of the user can be improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for realizing data retransmission control. Background technique [0002] The multiple input and multiple output (Multiple Input and Multiple Output, MIMO) system has become a technology that attracts much attention in the research of LTE because it can effectively improve the channel capacity. Moreover, the MIMO system uses precoding technology to multiplex between multiple data streams and antennas, which can make more effective use of existing channel resources; in addition, the system capacity can be increased by power allocation to data streams, and can reduce Interference between small data streams improves the overall performance of the system. [0003] The basic idea of ​​the precoding method for multi-user is: the transmitter at the transmitter knows the channel information of all users, so it can separate the signals between multiple users through the multi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/00H04L1/06
CPCH04L1/1887
Inventor 郭阳禹忠
Owner ZTE CORP
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