A Cognitive Interference Management Strategy in Two-layer Heterogeneous Network System
A heterogeneous network and interference management technology, applied in network planning, electrical components, wireless communication, etc., can solve problems such as reducing the bit error rate of femtocell users, accelerating the convergence of interference alignment algorithms, and the distribution of sub-user interference in cells.
A heterogeneous network and interference management technology, applied in network planning, electrical components, wireless communication, etc., can solve problems such as reducing the bit error rate of femtocell users, accelerating the convergence of interference alignment algorithms, and the distribution of sub-user interference in cells.
CN104125577BInactive Publication Date: 2017-09-26SHANGHAI NORMAL UNIVERSITY
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[0028] Below in conjunction with accompanying drawing and embodiment the present invention will be further described
[0029] An embodiment of a cognitive two-layer heterogeneous network cell area-based interference management strategy (see attached figure 1 shown), in the cognitive two-layer heterogeneous network structure, there is one macrocell user (MU) and three femtocell users (FU). The number of antennas at the sending end of FU and MU can be any number, and N is taken here t =N f =2, it is assumed that the receivers of both MU and FU can obtain perfect channel information, regardless of the interference from MU to FU. Specific steps are as follows:
[0030] First, the sending end of each user sends a femtocell base station (FBS 1 ), macro cell base station (MBS 0 ) to send an uplink signal, the base station feeds back channel information, and the sending end of each user obtains the channel status;
[0031] According to background sharing, the sending ends of FU an...
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The invention discloses an interference management strategy under a cognitive two-layer heterogeneous network system, specifically refers to a cell regionalized interference management strategy in a cognitive heterogeneous network, and relates to the technical field of wireless communication interference management. It includes: in a cell covered by a two-layer heterogeneous network, the macro cell user (MU) is the main user, and the femto cell user (FU) is the secondary user. Based on the change of the location of the MU, the interference of the FU will be corresponding The area where the MU is located is judged by the channel information, and then according to the different characteristics of the interference distribution in different areas, the interference of the FU and the interference of the MU are respectively aligned to reduce the interference of the FU and the MU. The interference alignment is implemented through the precoding design of each transmitting end of the FU and MU. To provide a higher rate for the next generation of wireless cellular networks, especially in the case of scarce frequency band resources, how to use idle frequency band resources and opportunistically access idle frequency bands to improve spectrum utilization provides a solid technical and material foundation.
Description
technical field [0001] The present invention relates to the technical field of wireless communication interference management, in particular to a cell-regional interference management strategy in a cognitive heterogeneous network. This interference management strategy ensures that femto Communication quality of cellular users (FU) and macrocellular users (MU). Background technique [0002] Femtocells are mainly designed for indoor wireless communications, providing higher rates for next-generation wireless cellular networks. The introduction of femtocells alleviates the load on macrocell base stations and the coverage problems that often exist. However, femtocell networks share the same frequency band resources with existing macrocellular networks, which will cause unavoidable co-channel interference. At the same time, frequency band resources are scarce resources. How to use idle frequency band resources has become a hot spot in wireless communication research in recent ye...
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Patent Timeline
26 Sep 2017
Publication
CN104125577B
- IPC
- H04W16/14; H04W24/04
- Inventors
- 李莉; 杨敬文