Downlink chain resource allocation method for heterogeneous network

Abstract

The invention discloses a downlink chain resource allocation method for a heterogeneous network in the communication resource management technology field under a hybrid network of a macro cell and a femto cell. The method comprises the steps of: building a user set and a usable resource block set; calculating and forming a user priority list; calculating the quantity of the resource blocks required by a user; selecting the user with the highest priority from the user priority list, and selecting the resource block with the best channel quality from the usable resource set so as to be allocated to the user with the highest priority, wherein the resource blocks directly allocated to the user with the highest priority have the same quantity as the resource blocks required by the user with the highest priority or the usable resource block set is empty; and calculating and updating the transmission power of the base station of the macro cell/ the femto cell on the usable resource blocks while being communicated with the user. By using the method, the interference among the cells is reduced, and the QoS (Quality Of Service) requirement of each user on each business is ensured, and the maximized system throughput as well as the fair among the users and the businesses are achieved.

Description

technical field [0001] The invention belongs to the technical field of communication resource management under a mixed network of macro cells and femto cells, and in particular relates to a method for allocating downlink resources of a heterogeneous network. Background technique [0002] Mobile users' demand for transmission bandwidth and data rate is increasing exponentially. The traditional cellular network architecture of IMT-Advanced (International Mobile Telecommunications-Advanced) can no longer meet the seamless coverage of hotspot areas such as indoors and small and medium-sized enterprises. , IMT-Advanced heterogeneous network architecture came into being. [0003] figure 1 is a heterogeneous network system architecture diagram, such as figure 1 As shown, in the Macro-Femto (Macrocell-Femtocell, macro cell-femto cell) heterogeneous network of the IMT-Advanced system, the femto cell shortens the distance between the antenna and the user by inserting a large number ...

AI Technical Summary

Problems solved by technology

[0007] ①Intelligent power control, only considering the physical layer technology;

[0008] ②Macro and Femto implement orthogonal resource allocation, and the spectrum utilization rate is low;

[0009] ③Multi-point coordinated transmission and reception, MeNodeB (Mecro Node Base, macro base station) and HeNodeB (Home Node Base, home base station) and HeNodeB and HeNodeB need to exchange information, the signaling overhead is large, and the implementation complexity is high. Large changes, not very good backward compatibility

[0011] ①Most technologies only consider the information interaction between the MAC layer and the physical layer, and a few technologies consider the joint optimization between the network layer, MAC layer, and physical layer. These technologies do not jointly design the five layers of TCP / IP, and do not maximize System performance improvement;

[0013] ③ Fairness indicators only focus on the balance of throughput among users, and most technologies do not consider the balance of QoS indicators such as delay, delay jitter, and packet loss rate among users

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