Abstract
In millimetre cellular wave (mmWave) networks, beamforming is an enabling technology. Although the beams in mmWave network are directional and in narrow shapes, there may also exist overlapped areas. To enable the multi-user simultaneous transmissions within the same time slot, the multi-beams subchannel assignment problem is formulated as a non-linear integer programming problem. To combat the complexity, a UE-group based subchannel assignment algorithm is proposed in this paper. According to the locations of the UEs’ in the overlapped areas, or the non-overlapped areas, the subchannels are assigned to the UE/UEs, where the beam spatial reuse gain and subchannel multi-user diversity gain are both exploited. Simulation results evaluate the performance of the proposed algorithm, and reveal the relationships of the beam spatial reuse gain and subchannel multi-user diversity gain, with the UE numbers and the downlink traffic load of each UE, respectively.
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Notes
- 1.
Suppose beam \(b_1\) and \(b_2\) share the same frequency, pointing to different directions. User \(n_1\) and \(n_2\) are covered by \(b_1\) and \(b_2\), respectively. Then user \(n_1\) and \(n_2\) can share the same subchannel of \(b_1\) and \(b_2\) at the same time. This is referred as the beam spatial reuse gain.
- 2.
For a given subchannel, different users may have different data rate on it, and when the user with highest data rate is selected then this selection bring a gain which is the subchannel diversity gain.
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Acknowledgment
This work was supported in part by the Science and Technology on Communication Networks Laboratory Open Projects (Grant No. KX162600031, KX172600027), the National Natural Science Foundations of CHINA (Grant No. 61271279, and No. 61501373), the National Science and Technology Major Project (Grant No. 2016ZX03001018-004), and the Fundamental Research Funds for the Central Universities (Grant No. 3102017ZY018).
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© 2018 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Yan, Z., Yang, M., Li, B., Liang, Y., Zuo, X. (2018). UE-Group Based Multi-beams Subchannel Assignment for mmWave Cellular Networks (Invited Paper). In: Lin, YB., Deng, DJ., You, I., Lin, CC. (eds) IoT as a Service. IoTaaS 2017. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 246. Springer, Cham. https://doi.org/10.1007/978-3-030-00410-1_39
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DOI: https://doi.org/10.1007/978-3-030-00410-1_39
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