Method and apparatus for determining feedback transmission resource for mobile stations and method and apparatus for providing information therefor

Abstract

The present invention provides a method and apparatus for determining feedback transmission resource for mobile stations based on game theory and a method and apparatus for providing information at a mobile station for determining feedback transmission resource for mobile stations. According to the method of determining feedback transmission resource, a game utility for each of the mobile stations at any price factor for feedback transmission resource is optimized under the feedback transmission resource constrain, and the method can comprise searching a best price factor at which the game utility for each of the mobile stations has a maximum value; and determining a value of the feedback transmission resource corresponding to the best price factor as the feedback transmission resource for each of the mobile stations. With embodiments of the present invention, each mobile station can maximize its performance in a distributed way and it is possible to result in close optimal performance compared with that of the centralized scheme and thus improve the overall throughout of wireless data network.

Description

Technical field [0001] The embodiments of the present invention generally relate to the field of wireless network technology, and more specifically to a method and device for determining feedback transmission resources for a mobile station based on game theory, and a method for providing information at the mobile station A method and device for determining feedback transmission resource information for a mobile station. Background technique [0002] It has been agreed that channel state information (CSI) is very important for downlink transmission in closed-loop wireless networks. CSI can be sent to the transmitter side through the feedback channel, which may affect the closed-loop capacity gain. Knowing about the wireless channel conditions, the transmitter can adapt to the propagation conditions by using various channel adaptation techniques. Especially in a multiple mobile station (MS) scenario, when the channel to the nearby co-channel MS is known, the signal to the interfe...

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Problems solved by technology

[0003] However, the feedback channel has limited capacity, and thus it is very important to study how to control the amount of feedback overhead according to individual needs in order to improve the quality of service (QoS) and maintain fairness among MSs

Much research has been done on the above issues, but ideal feedback for CSI is typically unavailable due to complexity or practicality constraints, thus it is difficult to achieve infinite feedback for CSI in reality

In addition, in existing wireless networks, it is typical to deal with each MS individually, and in the physical layer, e.g., from the perspective of communication theory or information theory to study the multi-MS CSI problem, it means that the interaction between MSs is not be taken into consideration

Therefore, the interactions between selfish mobile users in wireless systems cannot be efficiently modeled in the prior art

Moreover, in the case of limited feedback channels, there will be conflicts in the effective CSI feedback rates (rates) among the various MSs, that is, if one MS transmits too much CSI, this will cause other MSs' CSI feedback amount is reduced, and thus will impair the performance of other MS

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