6G多回程链路选择与功率分配联合优化方法

doi:10.11959/j.issn.2096-3750.2023.00284

Abstract

Abstract:

Aiming at the problem of limited single backhaul link capability of base stations in hotspot areas of the 6G system, a joint optimization method was proposed for multi-backhaul link selection and power allocation in an elastic coverage system, so that the data packets can select the appropriate backhaul link and transmission power according to their service characteristics and link conditions.Firstly, the transmission delay of data packets on the small cell sub-queue was analyzed by using queuing theory.Then, the optimization objective was modeled with the maximum delay tolerance elasticity value.Finally, the optimization problem were solved by the Hungarian algorithm and the Lagrangian duality and gradient descent method.The simulation results show that, compared with the traditional algorithm, the algorithm proposed reduces the average delay of URLLC (ultra-reliable and low-latency communication) service data packets and eMBB (enhanced mobile broadband) service data packets by 17% and 14% respectively, and effectively improves the network transmission rate.

Key words: 6G base station, multiple backhaul links, power allocation, joint optimization, queuing theory

CLC Number:

TN929.5

Qingyang LI, Xueting LI, Xiaorong ZHU. A joint optimization method of multi backhaul link selection and power allocation in 6G[J]. Chinese Journal on Internet of Things, 2023, 7(2): 67-75.

Figures/Tables 5

参数描述	数值
白噪声功率谱密度N₀	-174 dBm
SBS卫星回程链路分配带宽B_SB	20 MHz
SBS最大发射功率P_max	33 dBm
MBS覆盖半径R_{a 0}	1 000 m
SBS覆盖半径R_a1	100 m
天线增益G	18 dB
误差范围Δ	0.01
路径损耗系数α_SB	3.76
毫米波回程链路分配带宽B_MMW	1 GHz
卫星回程链路载频 $f_{c}^{SB}$	20 GHz
无线Mesh回程链路载频 $f_{c}^{WMB}$	2.4 GHz
毫米波回程链路载频 $f_{c}^{MMW}$	28 GHz
无线Mesh回程链路分配带宽B_WMB	20 MHz
遮挡因子α₀	1
用户发射功率P_UE	20 dBm

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