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IEEE 802.11ah is a WiFi standard developed to address requirements associated with the heterogeneous nature of the Internet of Things. It uses the sub‐1 GHz bands to enable long‐range transmissions for low‐power devices. However, long‐range coverage exacerbates the hidden node problem. To mitigate this problem, sectorization and grouping have been proposed by the standard. In this paper, hierarchical...
IEEE 802.11ah is a WiFi standard developed to support M2M communications, among other things. It caters for sub 1 GHz long range transmissions. However, this long range exacerbates the hidden node problem. Sectorization and grouping have been proposed to mitigate the hidden node problem. Sectorization can also be used to eliminate the overlapping basic service set problem. In this paper, we create...
In this paper, we present a power allocation technique that improves the sum rate and energy efficiency without reducing the minimum data rate of an established resource block allocation technique. To achieve this, the technique is implemented in two stages where the first is for ensuring that the minimum data rate remains unchanged. The second stage is for increasing the sum rate by ensuring that...
Power control and carrier allocation are the main focus of work on interference management in 3G heterogeneous networks. This work introduces interference management in 3G small base stations by coordinating the allocation of orthogonal variable spreading factor codes (OVSF) in order to improve both the guaranteed data rate and the system sum rate. The coordination is done by a centralised controller...
Switching off base stations is a popular approach to improving the energy efficiency a network. The challenge is how to determine which and how many base stations to switch off given a network configuration while ensuring that the network coverage is not compromised. Different algorithms have been formulated to solve this challenge ranging from load-aware algorithms to random selection. Results show...
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