Beam forming and user association method in joint optimization C-RAN

A beamforming and joint optimization technology, applied in the directions of space transmit diversity, transmission system, energy reduction, etc., can solve the problem of affecting network performance, ignoring the channel state information, the number of remote antenna unit loads, and only considering the transmit power of remote antenna units. and other problems to achieve the effect of improving system performance, reducing total transmit power, and preventing congestion.

Active Publication Date: 2021-03-09
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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  • Beam forming and user association method in joint optimization C-RAN
  • Beam forming and user association method in joint optimization C-RAN
  • Beam forming and user association method in joint optimization 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 beam forming and user association method in joint optimization C-RAN. The method comprises the following steps: S1, establishing a C-RAN mathematical model based on centralized processing and a distributed antenna system; S2, establishing an objective function and constraint conditions of the joint optimization problem mathematical model; S3, converting an original problem into a convex problem; and S4, solving the convex problem converted in the step S3 by adopting an iterative algorithm. According to the invention, beam forming and user association of the system canbe jointly optimized, so that a far-end antenna unit in the C-RAN reaches load balance, the transmitting power of the network is effectively reduced, and the method has a wide application prospect.

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...

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Application Information

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Patent Type & Authority Applications(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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