China
Africa
Explore chapters and articles related to this topic
Resource and Interference Management
Published in Wen Sun, Qubeijian Wang, Nan Zhao, Haibin Zhang, Chao Shen, Ultra-Dense Heterogeneous Networks, 2023
Wen Sun, Haibin Zhang, Nan Zhao, Chao Shen, Lawrence Wai-Choong Wong
The same-layer interference includes interference between macro cells and interference between small cells. The same-layer interference is mainly caused by the scarcity of spectrum resources, and it occurs when adjacent BSs use the same frequency band. Before the emergence of UDN, same-layer interference between macro BSs has already existed [97]. The study of interference management promotes the development of inter-cell interference coordination and CoMP. In UDN, most of the schemes about macro BS interference coordination cannot be applied to small BSs directly, due to the large number of small BSs and their irregular deployment. In general, BSs in the same layer have similar transmit power, so the interference problem in the same-layer is easy to solve compared with the cross-layer interference [98].
3GPP LTE/LTE-Advanced Radio Access Technologies
Published in Jerry D. Gibson, Mobile Communications Handbook, 2017
Enhanced Inter-cell Interference Coordination (eICIC), where neighbor cells exchange information aiding the scheduling in order to reduce intercell interference, is also supported. The eICIC scheme can be used for homogenous deployments with nonoverlapping cells of similar transmission power, as well as for heterogeneous deployments where a higher-power cell overlays one or several lower-power nodes (e.g., femto-cells). The relay functionality is supported where the relay node appears as a conventional base station (e-Node B or eNB) to terminals but is wirelessly connected to the remaining part of the radio-access network using the 3GPP LTE/LTE-Advanced radio-interface.
5G Concepts
Published in Saad Z. Asif, 5G Mobile Communications Concepts and Technologies, 2018
Before the advent of 5G, LTE and LTE-Advanced were perfect candidates for C-RAN. Features of LTE/4G such as CoMP and eICIC (Enhanced LTE Inter Cell Interference Coordination) can be supported with C-RAN. These features are greatly facilitated since signal processing of many cells can be done within a single BBU pool, which in turn reduces transmission delays. CoMP makes efficient use of the radio resources and provides processing gains due to the reduction in X2 (eNodeB to eNodeB interface) traffic (an inherent feature of C-RAN).
Resource Allocation in Macrocell–Femtocells via Combined Rain and Whale Optimization Algorithm
Published in Cybernetics and Systems, 2023
Shailaja Sanjay Mohite, Uttam D. Kolekar
Qi et al. (2021) established an energy-efficient resource allocation scheme for downlink OFDMA HetNets based on GA. To boost spectrum efficiency, frequency reuse-1 was employed. Advanced inter-cell interference coordination methods are necessary to mitigate inter-cell interference in 5 G HetNets. Furthermore, a two-step GA scheme was proposed to solve the optimization problem.