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Downlink multiuser scheduling method, device and base station

A multi-user scheduling and user technology, applied in multi-frequency code systems, electrical components, wireless communication, etc., can solve problems such as complex problems and no comprehensive consideration of user QoS requirements

Inactive Publication Date: 2010-09-22
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, in the existing OFDMA / SDMA resource allocation schemes, some are only based on the assumption that the user end is configured with a single antenna. When the user end is configured with multiple antennas, the signal space of each user is multi-dimensional, which makes the problem more complicated. Complex; some aim to maximize the throughput of the system or guarantee the minimum sending rate of each user, and give a suboptimal resource allocation algorithm
However, these resource allocation algorithms do not consider the user's QoS requirements comprehensively.

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  • Downlink multiuser scheduling method, device and base station
  • Downlink multiuser scheduling method, device and base station
  • Downlink multiuser scheduling method, device and base station

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Embodiment Construction

[0030] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are illustrated. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention.

[0031] The utility function is widely used in various fields of economics to study the relationship between fairness and efficiency, which is most concerned by people in economic activities. Utility represents the degree of satisfaction a consumer (or decision maker) gets from the outcome of its actions. More precisely, utility refers to how consumers rank among different goods and services. Economics uses it to explain how rational consumers allocate limited resources (i.e., income) among the various goods that give them the greatest satisfaction. The role of utility is to compare the size, and its absolute val...

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Abstract

The invention discloses a downlink multiuser scheduling method, a device and a base station. The method comprises the following steps: judging whether NC subcarriers are allocated or not; if not, initializing a candidate user set and the selected user set for the unallocated subcarriers; calculating a projection matrix of an orthogonal complement space of a channel generation space of the selected user and the utility increment of each user in the candidate user set; transferring the user with maximum effective increment to the selected user set; judging whether the user number in the selected user set is less than the maximum number multiplexed by each subcarier or not and the candidate user set is not an empty set or not; if yes, returning to the step of calculating the projection matrix and otherwise calculating a precoding matrix and instantaneous speed of each user in the selected user set; updating a utility function of each user in all user sets K being from 1, 2 to k if the NC subcarriers are allocated; and downlink scheduling each user in the selected user set by using the precoding matrix.

Description

technical field [0001] The present invention relates to the field of mobile communication, and more specifically, to a downlink multi-user scheduling method, device and base station. Background technique [0002] Orthogonal Frequency Division Multiple Access (OFDMA) and Space Division Multiple Access (SDMA) technologies are core technologies of next-generation wireless communications. OFDMA not only inherits the good anti-intersymbol interference and anti-frequency selective fading performance of Orthogonal Frequency Division Multiplexing (OFDM) technology, but also has the advantages of high spectrum efficiency and flexible access. OFDMA technology can be easily combined with other multiple access methods. For example, based on SDMA technology, it can further improve the capacity of the system by multiplexing multiple spatially separable users on the same time-frequency resource, making OFDMA / The application prospect of SDMA hybrid multiple access system is very broad. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/12H04L27/26
Inventor 田辉张平李兴民孙巧云董琨
Owner BEIJING UNIV OF POSTS & TELECOMM
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