Non-orthogonal full-diversity cooperative hybrid automatic repeat request control system and method thereof

Abstract

The invention discloses a non-orthogonal full-diversity cooperative hybrid automatic repeat request control system and a method thereof. In a current HARQ technology, retransmission efficiency is low so that a throughput is not high. By using the system and the method of the invention, the above problem is mainly solved. The system comprises a user terminal and a base station terminal. A working principle is characterized in that (1) a user sends data; (2) a base station and a cooperative user receive the data; (3) the base station determines whether the user data is received successfully and feeds back a response signal; if the base station receives the data successfully, a step (4) is executed; otherwise, a step (5) is executed and a retransmission process is performed; (4) the user determines whether the transmission is finished; if the transmission is finished, the transmission is completed; otherwise, a step (1) is returned to; (5) the user determines whether the data of the cooperative user is received successfully and feeds back the response signal; (6) the user determines a retransmission state according to a local verification signal and the feedback signal, and determines retransmission data information according to the retransmission state and then carries out the retransmission. The system and the method of the invention have the advantages that accuracy is high; high real-time performance is possessed and the throughput is high. The system and the method are suitable for HARQ control in a non-orthogonal full-diversity cooperative system.

Description

technical field [0001] The invention belongs to the field of wireless communication technology, and further relates to a non-orthogonal full diversity cooperative FDC hybrid automatic repeat request HARQ control system and method, which can be used in the next generation broadband wireless cooperative communication system to realize non-orthogonal full diversity cooperation Hybrid automatic repeat request HARQ flow control. Background technique [0002] With the vigorous development of the wireless communication industry, especially the emergence of 3G technology has promoted the development of mobile communication network data services, the ability to carry high-throughput, high-speed multimedia services and data services has become a must-have capability for future wireless communication systems. Therefore, what kind of transmission and retransmission scheme can be adopted to improve the throughput of data transmission while improving the utilization rate of system resourc...

AI Technical Summary

Problems solved by technology

[0004] The shortcomings of this method are: it does not consider the retransmission of data between cooperative users and between the base station and users, and does not choose the timing of retransmission, resulting in low retransmission efficiency and cannot meet the requirements of next-generation wireless communication. System efficiency and high throughput requirements

[0006] Although this method considers the cooperation between users and relays, it does not involve the cooperation between users, does not verify the received data, and the target user needs to send information in two time slots, which cannot meet the needs of next-generation broadband wireless networks. Efficiency and high throughput requirements of communication systems

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