A method for joint optimization of beamforming and user association in c-ran

A beamforming and joint optimization technology, applied in advanced technology, diversity/multi-antenna systems, space transmit diversity, etc., can solve the problem of affecting network performance, only considering the transmit power of the remote antenna unit, and ignoring the channel state information. The remote antenna unit The number of loads and other issues can improve system performance, reduce total transmit power, and prevent congestion.

Active Publication Date: 2021-11-12
SOUTHEAST UNIV
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Problems solved by technology

[0003] At present, the existing schemes for joint optimization of beamforming and user association in C-RAN, inducing reweighting Norm, only the transmit power of the remote antenna unit is considered, and the channel state information of the system and the load number of the remote antenna unit are ignored, which will inevitably cause the congestion of the base station in the high-traffic area, thus affecting the network performance. performance

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  • A method for joint optimization of beamforming and user association in c-ran
  • A method for joint optimization of beamforming and user association in c-ran
  • A method for joint optimization of beamforming and user association in c-ran

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings.

[0050] Such as figure 1 As shown, a kind of joint optimization C-RAN beamforming and user association method provided by the present invention comprises the following steps:

[0051] Step S1, establishing a C-RAN mathematical model based on centralized processing and a distributed antenna system; the specific steps are:

[0052] Step S11, configuration has 1 baseband unit pool, L with N l The C-RAN system of the remote antenna unit of the root antenna and the receiver users of K single antennas, wherein the baseband unit pool has known channel state information;

[0053] Step S12, establishing the transmit power model of the remote antenna unit, the transmit power of the lth remote antenna unit is Where ∑ means summation operation, ||·|| means norm operation, w l,k denotes the beamforming vector between the lth remote antenna unit and the kth receiver user;

[0054...

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Abstract

The invention discloses a method for jointly optimizing beamforming and user association in C-RAN, comprising the following steps: step S1, establishing a C-RAN mathematical model based on centralized processing and distributed antenna systems; step S2, establishing a joint optimization problem The objective function and constraint conditions of the mathematical model; step S3, converting the original problem into a convex problem; step S4, using an iterative algorithm to solve the converted convex problem of step S3. The invention can jointly optimize the beamforming and user association of the system, make the remote antenna units in the C-RAN achieve load balance and effectively reduce the transmission power of the network, and has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for joint optimization of beamforming and user association in C-RAN. Background technique [0002] In recent years, with the rapid development of mobile communication, more and more devices are connected to the mobile network, and the data traffic is increasing rapidly. As an emerging network structure, Cloud-radio access network (C-RAN) is considered to be able to meet the increasing traffic volume and service quality requirements of future communications. In C-RAN, traditional base stations are replaced by remote antenna units, and all remote antenna units are connected to the baseband unit pool through backhaul links. Therefore, the baseband unit pool can jointly process user information, thus effectively mitigating interference and improving the performance of the C-RAN system. The shared baseband unit pool of the cloud centralized architecture can e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0426H04B7/06H04B7/0452
CPCH04B7/043H04B7/0452H04B7/0617Y02D30/70
Inventor 朱鹏程张震李佳珉
Owner SOUTHEAST UNIV
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