4G/5G频谱资源协同关键技术

Key Technologies of 4G/5G Spectrum Resource Collaboration

为了使5G与4G的资源更好地协同,整体上发挥资源最大效益,重点分析了4G/5G部署在同一个频段时,如何根据4G和5G的网络负荷,通过载波级动态共享频谱资源的方式实现频谱资源利用率的最大化。现网试验证明,载波级动态频谱共享可提升5G可用RB数18%~55%(与60 M相比),下行拉网速率提升14%~32%。4G/5G同频部署还需解决小区间同频干扰,因此重点分析通过子带CQI进行频选调度,从而降低4G/5G间的干扰,通过现网试验,打开5G频选调度,下行速率可提升15%~23%。建议在5G建设初期开启载波级动态频谱共享和频选调度功能,提升频谱资源利用率和网络性能。

4G and 5G resources need to be effectively coordinated to maximize the benefits as a whole.To this end,this paper focuses on the method of maximizing the utilization of spectrum resources by performing carrier-level dynamic spectrum sharing according to the network load when 4G and 5G are deployed in the same frequency band.The test proves that carrier-level dynamic spectrum sharing can increase the number of 5G available RBs by 18% to 55% (compared with 60 M),and the downlink data rate can be increased by 14% to 32%.In addition,since intra-cell co-frequency interference is one of the key issues in implementing 4G/5G co-frequency deployment,sub-band CQI is used for frequency selective scheduling.Experiments show that the downlink data rate can be increased by 15% to 23% with 5G frequency selective scheduling.Therefore,enabling carrier-level dynamic spectrum sharing and frequency selective scheduling in the early stage of 5G construction can effectively improve spectrum resource utilization and network performance.