Packet scheduling method of multi-user multiple-input multiple-output system and apparatus thereof

A packet scheduling, multi-input technology, applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., can solve the problem of no packet scheduling algorithm to uniformly process the packet scheduling scheme, etc., to achieve high time diversity gain and increase effectiveness. , the effect of strong spectral efficiency

Inactive Publication Date: 2012-04-18
ZTE CORP
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Problems solved by technology

Referring to current protocols and literature, there is no packet scheduling scheme that can unify packet scheduling algorithm, MIMO mode selection, HARQ retransmission, etc. in a multi-user MIMO system

Method used

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  • Packet scheduling method of multi-user multiple-input multiple-output system and apparatus thereof
  • Packet scheduling method of multi-user multiple-input multiple-output system and apparatus thereof
  • Packet scheduling method of multi-user multiple-input multiple-output system and apparatus thereof

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Embodiment Construction

[0033] figure 1 Shows the structure of the MU-MIMO system, where the transmitting end (base station) and the receiving end have N t and N r Antennas, there are k data streams (that is, k users) that need to be transmitted in parallel, and the channel matrices between the sending end and each receiving end are H 1 、H 2 ,...H k ; After implementing the scheduling scheme, the sending end selects the scheduled k users for precoding; the receiving end detects the data, and feeds back ACK if the transmission is correct, and feeds back NACK if the transmission is incorrect.

[0034]The scheduling scheme of the present invention includes three parts: priority designation, user selection and pairing, and MIMO transmission mode selection. In the priority designation part, the HARQ information and Channel Quality Indication (CQI, Channel Quality Indication) information fed back by the receiving end are considered, so that the priority of the user not only considers the channel condit...

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Abstract

The invention discloses a packet scheduling method of a multi-user multiple-input multiple-output (MU-MIMO) system. The method comprises the following steps: using a sending terminal to carry out priority assignment on a user; according to priority of the user, and according to an MU-MIMO user pairing principle, carrying out user pairing; according to a result of the user pairing, selecting a multiple-input multiple-output (MIMO) transmission mode. Simultaneously, the invention discloses a packet scheduling apparatus of the MU-MIMO system. According to a scheme of the present invention, a high time diversity gain can be obtained, validity of retransmission is increased, in addition, a problem that a new user is obstructed because of a retransmission user can be avoided, and through carrying out user selection and pairing and selection of the MIMO transmission mode, strong frequency spectrum efficiency can be obtained according to an instantaneous status of a channel.

Description

technical field [0001] The present invention relates to a packet scheduling technology in a wireless communication system, in particular to a packet scheduling method and device for a Multi-User Multiple-Input Multiple-Output (MU-MIMO, Multi-User Multiple-Input Multiple-Output) system. Background technique [0002] The packet scheduling and resource allocation of the wireless communication system are related to the performance of the entire system. Among them, packet scheduling represents a concept related to time order. The packet scheduling algorithm hopes to solve how to determine when multiple users compete for resources. An order of service. From a theoretical point of view, the packet scheduling algorithm should be a branch of queuing theory. In a wireless communication system, in order to achieve better system performance on limited frequency domain resources, among the various functions of Radio Resource Management (RRM, Radio Resource Management), the packet schedu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04W72/12
Inventor 刘俊强林树功陈冬雷刘淑慧杨威常永宇
Owner ZTE CORP
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